Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
tra tuan » tran tuan, tra quan, tri tuan
tri quan » trinh quan, hai quan, mai quan
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - thanh ((tra tuan) or (tri quan)) dung ((cong tan) OR (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - thanh ((tra tuan) OR (tri quan)) dung ((cong tan) OR (cong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - thanh ((tra tuan) or (tri quan)) dung ((cong tan) OR (cong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - thanh ((tra tuan) or (tri quan)) dung ((cong tan) OR (cong thanh)) toan cau*.