Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thanh dung » thanh duong, thanh tung, thanh hung
hanh dung » anh dung, hanh dong, manh dung
manh toan » thanh toan, anh tuan, tinh toan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach

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 chu sach - ((hanh dung) OR (thanh dung)) va nhung cong ((xuan toan) OR (manh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh dung) OR (thanh dung)) va nhung cong ((xuan toan) or (manh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh dung) OR (thanh dung)) va nhung cong ((xuan toan) or (manh toan)) cau*.