Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
danh vai » danh sai, danh va, doanh van
thu san » thuy san, thu ban, phu san
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, dua tren
san ky » sang ky, van ky, dan ky

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: thu san ky nang xa hoi. ((lieu va) OR (hieu va)) nam thuc va danh vai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang xa hoi. ((lieu va) or (hieu va)) nam thuc va danh vai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang xa hoi. ((lieu va) or (hieu va)) nam thuc va danh vai ((cua tre) OR (cua triet))*.