Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu sach » chieu sach, dien sach, te sach
dung cong » dung trong
tung qua » dung qua, tuong quan, trung quan
qua dung » quang dung, su dung, qua song
cong tac » cong ty
toan cau » toan tap, toan tai
toan ban » van ban
toan cao » toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - thanh tung qua dung cong tac ((((toan cau) or (toan ban))) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - thanh tung qua dung cong tac ((((toan cau) OR (toan ban))) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung qua dung cong tac ((((toan cau) or (toan ban))) or (toan cao))*.