Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung dung » ung dung, dung ung, dung dong
dung gian » duong gian, dung giao, dung giam
cong tan » cong tac, cong san, cong thanh
tan dung » tran dung, tin dung, van dung
gian thi » gian thai, giang thi, giap thi
hieu ca » hieu cac, hieu cua, hieu va
thi ca » thi cam, thi cua, thi cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu sach) or (hieu ca)) - thanh cong tan dung dung gian thi ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu sach) OR (hieu ca)) - thanh cong tan dung dung gian thi ca*.