Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thong cua » thong tu, huong cua
nong cong » cong cong, tong cong, dong cong
nang cong » nang song, dang cong, bang cong
tac than » tac thanh, tam than, tac nhan
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 ((thong cua) or (thong quan)) ((nong cong) OR (nang cong)) tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((thong cua) OR (thong quan)) ((nong cong) OR (nang cong)) tac than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((thong cua) or (thong quan)) ((nong cong) OR (nang cong)) tac than cap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((thong cua) or (thong quan)) ((nong cong) OR (nang cong)) tac than cap*.