Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
cong tac » cong ty
khan cap » khan ap, than cap, khoan cam
toan ban » van ban
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh trung ((va hang) OR (va lang)) cong tac ((khan cap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung ((va hang) OR (va lang)) cong tac ((khan cap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh trung ((va hang) OR (va lang)) cong tac ((khan cap) or (toan ban))*".