Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, trinh toan
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
tran ban » tranh ban, tran van, toan ban

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 ((trinh vat) OR (trinh van)) nhung ((cong tan) or (cong tac)) tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh ((trinh vat) OR (trinh van)) nhung ((cong tan) OR (cong tac)) tran ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - hanh ((trinh vat) OR (trinh van)) nhung ((cong tan) or (cong tac)) tran ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh ((trinh vat) OR (trinh van)) nhung ((cong tan) or (cong tac)) tran ban*.