Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
tran cuong » tan cuong, tran cong, tran tuong
cuong dung » tuong duong, ung dung, thong dung
dung cong » dung trong
cong bang » cuong bang, dong bang, hong bang
hieu cua » hieu qua, dieu cua, bieu cua
toan ban » van 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)) - thanh tran cuong dung cong bang ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu ca) or (hieu cua)) - thanh tran cuong dung cong bang ((toan tap) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu ca) or (hieu cua)) - thanh tran cuong dung cong bang ((toan tap) OR (toan ban))*.