Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan tap » 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: toc ((hieu manh) OR (dieu hanh)) - anh tang cua nhung ((cong dan) or (cong tan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu manh) OR (dieu hanh)) - anh tang cua nhung ((cong dan) OR (cong tan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu manh) OR (dieu hanh)) - anh tang cua nhung ((cong dan) or (cong tan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: toc ((hieu manh) OR (dieu hanh)) - anh tang cua nhung ((cong dan) or (cong tan)) toan tap*.