Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
ban nhanh » ban hanh, ban thanh, ban nhan
lang van » dang van, tang van, hoang van
qua cham » qua hai, qua cac, va cham
cham duc » pham duc, cham soc, pham duy
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet

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 ty ((nang xa) or (lang van)) hoi. hieu qua cham duc ban nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang van)) hoi. hieu qua cham duc ban nhanh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang van)) hoi. hieu qua cham duc ban nhanh thai cua tre*.