Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
cua tre » cua te, cuu tre, cua triet
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 ((sang ma) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((sang ma) OR (nang ma)) hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((sang ma) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((sang ma) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) cam xuc va hanh vai cua tre*.