Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su sach » vu sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tang xa » trang xa, tang ma, lang xa
ty tang » tay tang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va
loc va » hoc va

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

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