Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu tinh » trieu tinh, tieu trinh, lieu tinh
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tap
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu tinh - thanh tung va hang ((nong dan) or (cong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - thanh tung va hang ((nong dan) OR (cong dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - thanh tung va hang ((nong dan) or (cong dan)) toan cau*.