Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
tay tang » tay lang, tay trung, tay quang
vu sach » su sach, vu khach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
luc va » tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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

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