Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
vai cua » dai cua, hai cua, lai cua
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang ((x hoi) OR (xa hoi)). hieu ((ve cam) or (va cam)) tuc xa hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (xa hoi)). hieu ((ve cam) OR (va cam)) tuc xa hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((x hoi) OR (xa hoi)). hieu ((ve cam) or (va cam)) tuc xa hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (xa hoi)). hieu ((ve cam) or (va cam)) tuc xa hanh vai cua tre*.