Perhaps you should try some spelling variations:
hien chong » chien chong, hien cong, hien chung
thanh dung » thanh duong, thanh tung, thanh hung
luong cong » dung cong, trong cong, cong cong
hanh dung » anh dung, hanh dong, manh dung
manh toan » thanh toan, anh tuan, tinh toan
cu luong » cat luong, huy luong, do luong
dan than » dan chan, ban than, van than

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 hien chong - ((hanh dung) OR (thanh dung)) cu luong cong ((manh toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien chong - ((hanh dung) OR (thanh dung)) cu luong cong ((manh toan) or (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc hien chong - ((hanh dung) OR (thanh dung)) cu luong cong ((manh toan) or (dan than)) cau*.