Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhieu tang » chieu sang, hieu lang, nhiet nang
banh trang » hanh trang, ban trang, banh rang
duong cong » dung cong, luong cong, duong trong
trang va » tran van, hang va
va duong » van duong, va tuong, va huong
cong san » cong tac
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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 nganh) or (nhieu tang)) - banh trang va duong cong san ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu nganh) OR (nhieu tang)) - banh trang va duong cong san ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu nganh) or (nhieu tang)) - banh trang va duong cong san ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu nganh) or (nhieu tang)) - banh trang va duong cong san ((than cau) OR (toan cau))*.