Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
trang va » tran van
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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)) - canh ((trang va) OR (hang va)) nhung cong san than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) OR (hieu lang)) - canh ((trang va) OR (hang va)) nhung cong san than cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) OR (hieu lang)) - canh ((trang va) OR (hang va)) nhung cong san than cau*.