Perhaps you should try some spelling variations:
ban hanh » ban hang
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
hieu ve » hieu va, hieu van
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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