Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh ve » hanh ve, thanh va, thanh vien
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu van
ty hang » ly hang, ty xang, thi hang
bac so » bac son, bac si, bac bo
so van » su van, vo van
hang x » nang x, hoang xa, chang xu
ve cuu » ve cau, ve chu, ve cua
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 ty hang x hoi. ((hieu ve) or (hieu va)) bac so van thanh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang x hoi. ((hieu ve) OR (hieu va)) bac so van thanh ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty hang x hoi. ((hieu ve) or (hieu va)) bac so van thanh ve cuu tre*.