Perhaps you should try some spelling variations:
dan dung » van dung, tin dung, ap dung
tang van » dang van, hoang van, trong van
nam thuc » nam thuoc, am thuc, nam thu
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc dan, thuc day
dan den » ban den, van den, quan den
ky tang » ky nang, ky dang, kho tang
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
vu sai » vu hai, vu san, vu tai
vu dai » vi dai, va dai, vu hai
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sai) or (vu dai)) ky tang van hoi. hieu ve nam thuc va ((dan den) OR (dan dung)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sai) OR (vu dai)) ky tang van hoi. hieu ve nam thuc va ((dan den) OR (dan dung)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sai) or (vu dai)) ky tang van hoi. hieu ve nam thuc va ((dan den) OR (dan dung)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sai) or (vu dai)) ky tang van hoi. hieu ve nam thuc va ((dan den) OR (dan dung)) cua tre*.