Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, vu cham, ve chim
ve chat » va chat, van chat
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((ve cham) or (ve chat)) luc va doanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((ve cham) OR (ve chat)) luc va doanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cham) or (ve chat)) luc va doanh tai cua tre*.