Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
ve chat » va chat, van chat
va cham » va chat, va tham
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, ma hoa, me 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 ((ma hoi) OR (xa hoi)). hieu ((va cham) or (ve chat)) duc va hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((ma hoi) OR (xa hoi)). hieu ((va cham) OR (ve chat)) duc va hanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((ma hoi) OR (xa hoi)). hieu ((va cham) or (ve chat)) duc va hanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((ma hoi) OR (xa hoi)). hieu ((va cham) or (ve chat)) duc va hanh lai cua tre*.