Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thuc van » thuc vat, thuc dan, thuc va
thanh vi » hanh vi, thanh va, thanh ve
te sach » toc sach
hieu va » lieu va, hieu qua
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
vi cua » vai cua, di cua
cua te » cua tu
va am » va lam, va cam

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 ((y lang) or (_ lang)) xa hoi. hieu va am thuc van thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (_ lang)) xa hoi. hieu va am thuc van thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) or (_ lang)) xa hoi. hieu va am thuc van thanh vi cua te*.