Carriers may refuse to carriage of baggage or items as follows:

1. Dangerous goods

Dangerous Goods are items that could threaten the safety of an aircraft, or the people on that aircraft.
Dangerous Goods are also known as restricted articles or substances which may posing a risk to health, safety, property or the environment such as acids, radioactive materials, poisons and explosives but also certain unlikely items such as magnets, wheelchair with wet-cell batteries, breathing apparatus with compressed gas cylinders, bull semen packed in dry ice, pesticides, etc.
Articles and substances which are classified as dangerous goods, which are forbidden for transport by air, must be shipped as cargo under special packing requirements and handling procedures.
List of dangerous goods:

2. Fragile/perishable items

Fragile items, such as: glass products, liquors etc., or perishable items (fresh or frozen foodstuff, floral and nursery stock; cut flowers and foliage) should not, in principle, be accepted as checked baggage, however, if a passenger insists, owing to his unsuitable size of baggage (for loading on cabin), such items may be accepted as checked baggage only at the owner’s risk.
Perishables (such as: durian, salted fish, shrimp etc.) that have strong smell will not be allowed to be carried as checked and unchecked baggage. However, if such kinds of perishables are firmly packed so that they cannot be smelled, they may be accepted as checked baggage.

3. Firearms and ammunition

Explosives, flammable or incombustible gases (such as aerosol spray paints, butane gas, gas lighter refills) refrigerated gas (such as oxygen cylinders for underwater use, liquid nitrogen), flammable liquids (such as paints, thinners, solvents) flammable solids (such as matches, lighters), organic oxygen compounds (such as resins), poisons, infectious substances (such as viruses, bacteria), radioactive substances (such as Radium), corrosives (eg acids, alkalis, mercury, thermometers), magnetic material, and oxidizing materials (such as bleach); are not allowed to be carried on the plan.
Weapons such as guns, swords, ancient knives and similar items. Such items may be permitted to be transported as checked baggage entirely as per our decision and are not allowed to be carried on the plane for any reasons.

4. Liquid

Each passenger is accepted to carry not greater than 1000 ml of liquids with them or in his/her cabin baggage on board the aircraft.
All liquids must be carried in bottles, vials or containers with a capacity not greater than 100 ml and be firmly closed.

5. Valuable items

Passengers are advised not to include money, jewelry, precious metals, silverware, computers, cameras, video cameras, negotiable papers, securities or other valuable items, business documents, passports and other identification document or samples in their checked baggage. If these items are processed with checked baggage, the passenger agrees to accept all the risks during transportation.

6. Disclaimer

Carriers will not be responsible for any damage of baggage due to the cause of force majeure including but not limited to act of God, war, strike, trade embargo...
Also carriers will not responsible for any damage due to items or objects inside the passenger’s baggage.
In case items contained in the baggage of customers led to the damage of carriers’ assets or other passenger’s baggage, the passenger must compensate all the damage and loss that carriers has to bear due to the that damage.
Additionally, carriers will not responsible for damage of fragile, perishable items, money, jewelry, note, bond or any valuable documents, passport, identity paper, sample contained in the checked baggage whether carriers knows passenger put those items or objects in their bags or not.
Besides, carriers will not responsible for compensating for any damage, which is discovered outside the baggage claim area or in case carriers is not informed about the damage right at the baggage claim area.

Passengers are advised to contact customer service center before your flight for more details if any inquiry.