Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
chung cong » nhung cong, chong cong, phung cong
canh manh » lanh manh, canh tranh, cach mang
cua chung » cua nhung, luan chung, luat chung
manh cua » doanh cua, ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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) or (hieu quang)) - canh manh cua chung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu quang)) - canh manh cua chung cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quang)) - canh manh cua chung cong tan toan ban*.