Perhaps you should try some spelling variations:
thiet thuat » thien thuat, chien thuat, trien thuat
tinh nang » trinh nang, tin nang, tich nang
lien soat » kiem soat, bien soan, lien son
van luat » dan luat, va luat, van xuat
suat va » xuat va
luat va » xuat va, luat ve, luan va
va lien » vat lieu, hai lien

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh nang suat va thiet thuat ) or ( dinh van luat va lien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh nang suat va thiet thuat ) OR ( dinh van luat va lien soat ))*.