Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cham tuc » nham thuc, pham thuc, tham thuc
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa

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 nang) or (v nang)) xa hoi. hieu ve cham tuc va doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu ve cham tuc va doanh van cua tre*.