Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh quang
theo yeu » thiet yeu, theo chu
vat dung » van dung, viet dung, mat duong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
va dung » van dung, va duong, va ung

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 yeu) OR (theo tieu)) tinh - nhanh mang ((va dung) OR (vat dung)) cong dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo yeu) or (theo tieu)) tinh - nhanh mang ((va dung) OR (vat dung)) cong dan toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((theo yeu) or (theo tieu)) tinh - nhanh mang ((va dung) OR (vat dung)) cong dan toan ban*.