Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren cau » tren ca, tren cay, tren tau

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