Perhaps you should try some spelling variations:
thanh trung » thanh tung
tieu tinh » trieu tinh, tieu trinh, lieu tinh
dung cong » dung trong
trung ap » trung cap, trung lap, trung tam
cong tan » cong tac, cong san, cong thanh
phan dau » phan tu, hang dau
ap dung » xay dung, van dung

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 trung ap dung cong tan ((phan lap) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - thanh trung ap dung cong tan ((phan lap) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - thanh trung ap dung cong tan ((phan lap) or (phan dau))*.