Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va doanh » vay doanh, va danh, hoa doanh
thu nang » thi nang, thu bang, tho nang
thu hang » thi hang, thuc hanh, thu huong
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, su sach, te sach
van cuu » van cau, van chu, van cu
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuu tre » cua tre, cau tren, cau treo

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 ((thu nang) or (thu hang)) xa hoi. hieu ve cham duc ((va doanh) OR (van doanh)) van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu nang) OR (thu hang)) xa hoi. hieu ve cham duc ((va doanh) OR (van doanh)) van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu nang) or (thu hang)) xa hoi. hieu ve cham duc ((va doanh) OR (van doanh)) van cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu nang) or (thu hang)) xa hoi. hieu ve cham duc ((va doanh) OR (van doanh)) van cuu tre*.