Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
luong van » luong va, duong van, luong vat
vuong tat » luong tai, vuong thi, tuong tac
khoan cam » khoa cam, khoan va, phan cam
dung ham » duong ham, dung ha, dung lam
ham hung » pham hung, cam hung, ha hung
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: theo chieu sach - thanh dung ham hung ((luong van) or (vuong tat)) ((than cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh dung ham hung ((luong van) OR (vuong tat)) ((than cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh dung ham hung ((luong van) or (vuong tat)) ((than cap) or (khoan cam))*.