Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
nang ro » nang co, nang ho, nang ra
sach v » sach va, sach y, sach 2
luc va » duc va, tuc va
loc va » hoc va
nang o » nang co, nang ho, nang x

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 v ((nang o) OR (nang ro)) hoi. hieu va tham ((luc va) or (loc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v ((nang o) OR (nang ro)) hoi. hieu va tham ((luc va) OR (loc va)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v ((nang o) OR (nang ro)) hoi. hieu va tham ((luc va) or (loc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach v ((nang o) OR (nang ro)) hoi. hieu va tham ((luc va) or (loc va)) hanh vai cua tre*.