Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh tran » hanh trang, thanh tran, hanh tram
tran viet » trien viet, gian viet, san viet
viet dung » viet hung, viet huong, viet trung
trong tac » trong cac, tuong tac, trong tan
nang sang » nang song, nong san
nang quan » ban quan, nang suat
ho chieu » theo chieu, hoc thieu, mot chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh tran viet dung trong tac ((nang sang) or (nang quan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh tran viet dung trong tac ((nang sang) OR (nang quan))*.