Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
dong cong » duong cong, dung cong, dang cong
thanh cac » hanh cac, thanh bac, thanh ca
cong cao » cong cau, cong cac, cong co
cao dong » cao dang, lao dong, cao cong
cong san » cong tac
than cap » khan cap, thanh lap, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (chieu sach)) - thanh cong cao dong cong san ((than cap) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - thanh cong cao dong cong san ((than cap) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - thanh cong cao dong cong san ((than cap) or (thanh cac))*.