Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
bo sach » co sach
va chat » van chat, va phat, cao chat
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
tu hang » thu hang, tu hanh, tu hung
cua tre » cua te, cuu tre, cua triet
xuc va » tuc va, luc va, xac va

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

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