Perhaps you should try some spelling variations:
thanh tung » thanh cong
tieu sach » chieu sach, dien sach, te sach
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
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 cua dung cong tan ((((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 cua dung cong tan ((((toan cau) OR (toan ban))) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - thanh tung cua dung cong tan ((((toan cau) OR (toan ban))) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - thanh tung cua dung cong tan ((((toan cau) OR (toan ban))) or (toan cao))*.