Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
va thuat » ky thuat, ki thuat, va thuc
toc sach » hoc sach, doc sach, thuoc sach
nang tai » hang tai, tang tai, sang tai
va nhanh » va thanh, va hanh, va nhan
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
tai hoi » tai khoi, dai hoi, tai hai
xuc va » duc va, tuc va, luc va
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) y nang tai hoi. lieu ((va cham) or (va thuat)) xuc va nhanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang tai hoi. lieu ((va cham) OR (va thuat)) xuc va nhanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y nang tai hoi. lieu ((va cham) or (va thuat)) xuc va nhanh hai cua tre*.