Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
hoan quang » doan quang, doanh quang, hoach quang
quang dung » quang trung, ung dung, cuong dung
dung cong » dung trong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cau » thanh chau, thanh mau, nhanh cau
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (mot chieu)) sach - doanh hoan quang dung cong tan thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) sach - doanh hoan quang dung cong tan thanh cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) sach - doanh hoan quang dung cong tan thanh cau*.