Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
tang luan » dung luan
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
tran chau » tranh chap, tran huu
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren

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 luan dang cong tac tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (hieu lang)) - anh tang luan dang cong tac tran chau.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (hieu lang)) - anh tang luan dang cong tac tran chau*.