Perhaps you should try some spelling variations:
hien sach » dien sach, kien sach, thien hach
dang cong » dung cong
chang dam » chang ham, hang dam, hang dau
anh hang » anh hoang, anh bang, anh dang
anh hung » anh huong, manh hung, anh dung
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - ((anh hang) or (anh hung)) cua dang cong tan ((than cap) or (chang dam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - ((anh hang) OR (anh hung)) cua dang cong tan ((than cap) OR (chang dam)).
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - ((anh hang) or (anh hung)) cua dang cong tan ((than cap) or (chang dam))*.