Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
hang xa » hoang xa, hang va, lang xa
hang ca » hang va, nang cao, hang tai
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
va han » va phan, van han, va hang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((hang xa) OR (hang ca)) hoi. hieu ve cam xuc ((va han) OR (va hanh)) tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((hang xa) or (hang ca)) hoi. hieu ve cam xuc ((va han) OR (va hanh)) tri cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sach y ((hang xa) or (hang ca)) hoi. hieu ve cam xuc ((va han) OR (va hanh)) tri cua tre*.