Perhaps you should try some spelling variations:
cuong dung » tuong duong, ung dung, thong dung
thanh tan » thanh toan, thanh tuan, thanh san
tan cuong » tang cuong, van cuong, van chuong
dung cong » dung trong
hieu cua » hieu qua, dieu cua, hieu luat
bieu cua » dieu cua, ben cua, dien cua
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
toan tap » toan ban
hieu ca » hieu cac, hieu va, hieu xa

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: doc ((hieu ca) OR (((hieu cua) OR (bieu cua)))) - thanh tan cuong dung cong ban toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu ca) or (((hieu cua) OR (bieu cua)))) - thanh tan cuong dung cong ban toan tap~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu ca) or (((hieu cua) OR (bieu cua)))) - thanh tan cuong dung cong ban toan tap*.