Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
tieu sach » chieu sach, dien sach, te sach
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
chay cao » cay cao, chat cao, nha cao

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 - doanh doanh ((cua dung) or (qua dung)) ((cong dan) or (cong tan)) chay cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - doanh doanh ((cua dung) OR (qua dung)) ((cong dan) OR (cong tan)) chay cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - doanh doanh ((cua dung) or (qua dung)) ((cong dan) or (cong tan)) chay cao*.