Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
trung dap » trung cap, trung dam, trung lap
trung dai » truong dai, truong dao, trung tam
cong van » cong vang, cong san, song van
cong tac » 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 - hanh ((trung dap) or (trung dai)) ung ((cong van) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh ((trung dap) OR (trung dai)) ung ((cong van) OR (cong tac)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh ((trung dap) or (trung dai)) ung ((cong van) or (cong tac)) toan cau*.