Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
anh tang » anh bang, anh dang, anh nang
cua dang » cua ban
nong dan » cong dan, nong san, nguong dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - anh tang ((cua dang) OR (cua cong)) nong dan ((than cao) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - anh tang ((cua dang) OR (cua cong)) nong dan ((than cao) or (than cap))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - anh tang ((cua dang) OR (cua cong)) nong dan ((than cao) or (than cap))*.