Perhaps you should try some spelling variations:
ban hanh » ban hang
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
vi cua » vai cua, di cua

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 y) or (sach thu)) ((nang ma) or (lang xa)) hoi. hieu van cac xuc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) ((nang ma) OR (lang xa)) hoi. hieu van cac xuc ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach thu)) ((nang ma) or (lang xa)) hoi. hieu van cac xuc ban hanh vi cua tre*.