Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh toan
hieu quang » thieu quang, hieu qua, diep quang
thanh hang » thanh hoang, tranh hang, thanh hung
thong cong » trong cong, tong cong, thong thong
hieu quan » hieu qua, lieu quan, thien quan
va thong » va thuong, va phuong, he thong
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quang) OR (hieu quan)) - ((thanh hang) OR (thanh thang)) va thong cong ban than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu quang) OR (hieu quan)) - ((thanh hang) or (thanh thang)) va thong cong ban than cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu quang) OR (hieu quan)) - ((thanh hang) or (thanh thang)) va thong cong ban than cau*.