Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang o hai. hieu van cham ((xuc van) or (duc van)) nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang o hai. hieu van cham ((xuc van) OR (duc van)) nhanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang o hai. hieu van cham ((xuc van) or (duc van)) nhanh thai cua tre*.