Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
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: co sach y ((lang xa) or (lang ha)) hoi. hieu ve cam xuc ((va hanh) or (va dinh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y ((lang xa) OR (lang ha)) hoi. hieu ve cam xuc ((va hanh) OR (va dinh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach y ((lang xa) or (lang ha)) hoi. hieu ve cam xuc ((va hanh) or (va dinh)) vai cua tre*.