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

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