Perhaps you should try some spelling variations:
thanh van » thanh toan, thanh phan, thanh nhan
thu sach » tu sach, thuat sach, thuoc sach
su sach » so sach, vu sach
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) ly vang xa hoi. hieu va cam xuc va ((thanh van) OR (thanh san)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ly vang xa hoi. hieu va cam xuc va ((thanh van) OR (thanh san)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) ly vang xa hoi. hieu va cam xuc va ((thanh van) OR (thanh san)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ly vang xa hoi. hieu va cam xuc va ((thanh van) OR (thanh san)) cua tre*.