Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
te sach » toc sach
vai cuu » vai cua
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
tu nano » truc nano
hieu va » lieu va, hieu qua
tu nang » tru nang, tu nong, tu lang
tuc va » thuc va, tuc xa, duc va
va cao » va cac, va co, va dao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((tu nang) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (truc va)) thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((tu nang) OR (tu nano)) x hoi. hieu va cao ((tuc va) OR (truc va)) thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((tu nang) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (truc va)) thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((tu nang) or (tu nano)) x hoi. hieu va cao ((tuc va) OR (truc va)) thanh vai cuu tre*.