Perhaps you should try some spelling variations:
ban hanh » ban hang
tay lang » tai lang, tay tang, tay quang
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
hieu va » lieu va, hieu qua
ty lang » ty xang, ty hang, tu lang
cua tre » cua te, cuu tre, cua triet

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 lang) OR (tay lang)) xa hoi. hieu va cac xuc ((va dinh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty lang) OR (tay lang)) xa hoi. hieu va cac xuc ((va dinh) OR (ban hanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty lang) OR (tay lang)) xa hoi. hieu va cac xuc ((va dinh) or (ban hanh)) vai cua tre*".