Perhaps you should try some spelling variations:
thanh hoang » thanh cong, thanh hoa, thanh toan
thanh hang » thanh thang, tranh hang, thanh hung
dung cong » dung trong
hoc hieu » hoc thieu, doc hieu, hoc dieu
vat dung » van dung, va dung, viet dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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: ((hoc hieu) OR (hoc hien)) cach - ((thanh hang) OR (thanh hoang)) vat dung cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc hien)) cach - ((thanh hang) OR (thanh hoang)) vat dung cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) cach - ((thanh hang) OR (thanh hoang)) vat dung cong san toan ban*.