Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh tai, hanh van
phan dau » phan tu, hang dau
lang man » lang van, lang ban, lang mai
man hoi » man hoai, dan hoi, van hoi
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
dau va » dau ve, lau va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky lang man hoi. hieu ve phan dau va ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang man hoi. hieu ve phan dau va ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang man hoi. hieu ve phan dau va ((hanh vai) or (hanh va)) cua tre*.