Perhaps you should try some spelling variations:
thanh ban » thanh san, thanh van, thanh bac
cuong tap » luong tap, cong tac, luong tai
doanh cao » doanh co, doanh bao, doanh cho
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
doan cao » toan cao, doan cap, hoang 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 chu sach - thanh ban ((cua dung) or (qua dung)) cuong tap ((doan cao) OR (doanh cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh ban ((cua dung) OR (qua dung)) cuong tap ((doan cao) OR (doanh cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - thanh ban ((cua dung) or (qua dung)) cuong tap ((doan cao) OR (doanh cao))*".