Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
doanh cua » doanh luan
dung cong » dung trong
manh cua » ban cua
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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 chiet tach - hanh ((manh cua) OR (doanh cua)) dung cong tan toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((manh cua) or (doanh cua)) dung cong tan toan ban*.