Perhaps you should try some spelling variations:
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
cam nhung » cam hung, nam nhung, tham nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
ca nung » cua nhung, va nhung, tay nung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh chinh ((ca nung) or (cam nhung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh chinh ((ca nung) OR (cam nhung)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh chinh ((ca nung) or (cam nhung)) cong tac toan cau*.