Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lam xuc » cam xuc, lam duoc
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ty tang » tay tang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa
ve cuu » ve cau, ve chu, ve cua

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 tang ma hoi. ((hieu van) or (hieu va)) ((lam xuc) or (am thuc)) ban thanh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty tang ma hoi. ((hieu van) OR (hieu va)) ((lam xuc) OR (am thuc)) ban thanh ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ty tang ma hoi. ((hieu van) or (hieu va)) ((lam xuc) or (am thuc)) ban thanh ve cuu tre*.