Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hanh hang » thanh hang, hang hang, hanh han
cua nhung » va nhung
chu sach » cau sach, thu sach, chieu sach
hang cua » mang cua, hang ca, huong cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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) OR (chiet tach)) - hanh hang cua nhung cong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (chiet tach)) - hanh hang cua nhung cong tac toan cau*.