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
ban cua » ban quan
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang noi
nang o » nang ho, nang ro, nang x
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 ky ((nang o) or (nang co)) hoi. hieu ve cac xuc ((van hanh) or (ban hanh)) ban cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang o) OR (nang co)) hoi. hieu ve cac xuc ((van hanh) OR (ban hanh)) ban cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang o) or (nang co)) hoi. hieu ve cac xuc ((van hanh) or (ban hanh)) ban cua tre*.