Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((hieu manh) OR (dieu hanh))) or (hieu lang)) - anh tang cua cong cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((hieu manh) OR (dieu hanh))) OR (hieu lang)) - anh tang cua cong cong tac tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((hieu manh) OR (dieu hanh))) or (hieu lang)) - anh tang cua cong cong tac tran cau".
• Adding a wildcard symbol may retrieve word variants: theo ((((hieu manh) OR (dieu hanh))) or (hieu lang)) - anh tang cua cong cong tac tran cau*.