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

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