Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va doanh » vay doanh, va danh, hoa doanh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cham lo » cham o, cam lo, cham soc
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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