Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
thanh tra » thanh toan, thanh hoa
tong cong » trong cong, cong cong, dung cong
than cao » toan cao, thai cao, than cap
khan cap » khan ap, than cap, khoan cam
tra van » tran van, ta van, trang van

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 tra van ((nhung cong) or (tong cong)) san ((than cao) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tra van ((nhung cong) OR (tong cong)) san ((than cao) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tra van ((nhung cong) or (tong cong)) san ((than cao) or (khan cap))*.