Perhaps you should try some spelling variations:
nuoc tren » thuoc tren
hang doi » hang di, hang loi, huong doi
nang doi » nang doc, nang noi, nang dong
anh thuc » am thuc, dan thuc, anh tu
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
tu nano » truc nano
thuc va » thuc vat, thuc dan, thuc day
tu nang » tru nang, tu nong, tu lang
va anh » van anh, va danh, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((tu nang) or (tu nano)) xa hoi. hieu va anh thuc va ((nang doi) or (hang doi)) nuoc tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tu nang) OR (tu nano)) xa hoi. hieu va anh thuc va ((nang doi) OR (hang doi)) nuoc tren.
• Adding a wildcard symbol may retrieve word variants: toc sach ((tu nang) or (tu nano)) xa hoi. hieu va anh thuc va ((nang doi) or (hang doi)) nuoc tren*.