Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
doi chieu » doc hieu, doi chi, ho chieu
hanh hanh » hanh han, xanh hanh, nhanh thanh
cong dan » huong dan, cong dong, cong tac
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan tap » toan ban
hanh va » hang va, hanh vi

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