Perhaps you should try some spelling variations:
nhan thai » nhanh thai, nhan tai, nhan tham
thai cua » than cua, tai cuc, tri cua
hoc sach » hoc sinh, hoc cac, hoc anh
te sach » toc sach
va nhan » van nhan, ca nhan, va phan
va chat » van chat, va phat, cao chat
va cham » va tham
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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 (hoc sach)) ky sang ma hoi. lieu ((va cham) or (va chat)) luc va nhan thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) ky sang ma hoi. lieu ((va cham) OR (va chat)) luc va nhan thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky sang ma hoi. lieu ((va cham) or (va chat)) luc va nhan thai cua tre*.