Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chung cong » nhung cong, chong cong, phung cong
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong san, cong tan, huong dan
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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 ((truong cao) or (truong dai)) chung cong dan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh ((truong cao) OR (truong dai)) chung cong dan khan cap*.