Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
tang ma » mang may, tang van
xang ma » nang ma, sang ma, rang ma
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((xang ma) OR (tang ma)) hoi. ((hieu ve) or (hieu van)) cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((xang ma) OR (tang ma)) hoi. ((hieu ve) OR (hieu van)) cam xuc va hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((xang ma) OR (tang ma)) hoi. ((hieu ve) or (hieu van)) cam xuc va hanh vai cua tre*".