Perhaps you should try some spelling variations:
hieu sach » chieu sach, dien sach, hieu cac
hieu cach » hieu cac, chieu sach, hieu ca
cong cong » cong dong, trong cong, dung cong
anh quan » ban quan, anh nhan, anh quoc
cong tap » cuong tap, cong tac, cong tan
tap doan » tap quan
doan cao » doanh cao, toan cao, doan cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) OR (hieu cach)) - ((anh quan) or (anh tuan)) thanh cong cong tap doan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (hieu cach)) - ((anh quan) OR (anh tuan)) thanh cong cong tap doan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sach) OR (hieu cach)) - ((anh quan) or (anh tuan)) thanh cong cong tap doan cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) OR (hieu cach)) - ((anh quan) or (anh tuan)) thanh cong cong tap doan cao*.