Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
tran chau » tranh chap, tran huu
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cua dang » cua cong, cua ban
cong tac » cong ty
tran cau » toan cau, ran cau, tra 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 (hieu lang)) - anh tang cua dang cong tac ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (hieu lang)) - anh tang cua dang cong tac ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (hieu lang)) - anh tang cua dang cong tac ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (hieu lang)) - anh tang cua dang cong tac ((tran cau) OR (tran chau))*.