Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
nang dau » hang dau, xang dau, nang du
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
dau hoi » cau hoi, dai hoi, dan hoi
sach ky » sac ky, sach kem, sach hay
sach ty » sach tu, sach thu, xach tay
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 ky) OR (sach ty))) or (sach y)) nang dau hoi. hieu va cac xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((((sach ky) OR (sach ty))) OR (sach y)) nang dau hoi. hieu va cac xuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((((sach ky) OR (sach ty))) or (sach y)) nang dau hoi. hieu va cac xuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((((sach ky) OR (sach ty))) or (sach y)) nang dau hoi. hieu va cac xuc va hanh vai cua tre*.