Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
cuu tre » cau tren, cau treo
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cua triet, dua tren
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ma hoi » xa hoi, ma hoa, me hoi
ve nam » he nam, va nam, le nam

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: tu can ky nang ((ma hoi) OR (mai hoi)). hieu ve nam thuc va thanh de ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang ((ma hoi) OR (mai hoi)). hieu ve nam thuc va thanh de ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((ma hoi) OR (mai hoi)). hieu ve nam thuc va thanh de ((cua tre) or (cuu tre))*.