Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
te sach » toc sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va
vi cua » vai cua, di cua
cua te » cua tu
y lang » o lang, tay lang, yen lang
ha hoi » hoa hoi, ha noi, xa hoi
_ lang » o lang, _ land

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (_ lang)) ha hoi. ((hieu ve) OR (hieu van)) cam thuc va hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) OR (_ lang)) ha hoi. ((hieu ve) or (hieu van)) cam thuc va hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y lang) OR (_ lang)) ha hoi. ((hieu ve) or (hieu van)) cam thuc va hanh vi cua te*.