Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac

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 xang ((ma hoi) or (xa hoi)). hieu ve cac xuc ((van hanh) OR (ban hanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang ((ma hoi) OR (xa hoi)). hieu ve cac xuc ((van hanh) OR (ban hanh)) lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty xang ((ma hoi) or (xa hoi)). hieu ve cac xuc ((van hanh) OR (ban hanh)) lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang ((ma hoi) or (xa hoi)). hieu ve cac xuc ((van hanh) OR (ban hanh)) lai cua tre*.