Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
cham loc » cham soc, chon loc, cham o
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
ly nang » ky nang, ly hang, ly vang
va cham » va chat, va tham
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
loc va » hoc va, luc va

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 ((ly nang) or (v nang)) xa hoi. lieu va cham loc va doanh ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (v nang)) xa hoi. lieu va cham loc va doanh ban cua tre*.