Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
va thanh » gia thanh, ban thanh, va tinh
trang va » tran van, hang va
danh vai » danh sai, danh va, doanh van
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
y trang » _ trang, y trong, y trung
va tham » van tham, va cham, va thuat
cuu tre » cua tre, cau tren, cau treo
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y trang va hoi. hieu ((va tham) OR (va thanh)) thuc dan ((danh vai) or (doanh ban)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y trang va hoi. hieu ((va tham) OR (va thanh)) thuc dan ((danh vai) OR (doanh ban)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y trang va hoi. hieu ((va tham) OR (va thanh)) thuc dan ((danh vai) or (doanh ban)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y trang va hoi. hieu ((va tham) OR (va thanh)) thuc dan ((danh vai) or (doanh ban)) cuu tre*.