Perhaps you should try some spelling variations:
thieu luat » hieu luat, hieu suat, hien luat
tran manh » tran minh, tran thanh, tran van
dung dang » dung dan, dung dong, dung danh
manh thi » anh thi, minh thi, oanh thi
dang vat » dang van, dong vat, dang nhat
vat sieu » vat lieu, vat bien, dat hieu
sieu van » hieu van, su van, lieu va
thi toc » thi tac, thi goc, thi loc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tran manh thi toc thieu luat ) or ( trinh dung dang vat sieu van ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tran manh thi toc thieu luat ) OR ( trinh dung dang vat sieu van ))*.