Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
lang xa » dang xay, lang van
lang ha » long ha
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: so sach y ((lang xa) or (lang ha)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((lang xa) or (lang ha)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) vai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((lang xa) or (lang ha)) hoi. hieu ve cam xuc ((va hanh) OR (va danh)) vai cua tre*.