Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
trung cap » truong cao, trung tam
dung cong » dung trong
khoan cam » khoa cam, khoan va, phan cam
trung ap » trung lap, trung tam, trung dai
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

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 ((trung ap) or (trung cap)) dung cong san ((than cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - thanh ((trung ap) OR (trung cap)) dung cong san ((than cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - thanh ((trung ap) or (trung cap)) dung cong san ((than cap) or (khoan cam))*.