Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
hieu luat » hieu qua
dung tang » dung thang, dung trang, dung dang
tan cong » tan cuong, tran cong, toan cong
cong tan » cong tac, cong san, cong thanh
ban hieu » van hieu, gian hieu, phan hieu
tang van » dang van, hoang van, trong van
van dien » van tien, van hien, van kien
tan ban » toan ban, tang ban, van ban
hoa » khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tan cong tan ban hieu luat ) or ( tinh dung tang van dien hoa ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tan cong tan ban hieu luat ) OR ( tinh dung tang van dien hoa ))*.