Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » lieu tinh, chau tinh, kieu tinh
trung ap » trung cap, trung lap, trung tam
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap
ap dung » xay dung, van dung

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: doi ((chieu tinh) OR (trieu tinh)) - thanh trung ap dung ((cong tan) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tinh) OR (trieu tinh)) - thanh trung ap dung ((cong tan) or (cong tac)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) OR (trieu tinh)) - thanh trung ap dung ((cong tan) or (cong tac)) toan cau*.