Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
huong cong » luong cong, duong cong, cuong cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
mai huong » mai phuong, mai hung, tai phuong
thanh cao » thanh cac, thanh thao, thanh cham
tung mai » thuong mai, huong mai, tung manh
cong san » cong tac
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu sach)) - thanh tung mai huong cong san ((thanh cao) OR (thanh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sach)) - thanh tung mai huong cong san ((thanh cao) OR (thanh ca))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu sach)) - thanh tung mai huong cong san ((thanh cao) OR (thanh ca))*".