Perhaps you should try some spelling variations:
thien van » thi van
chat thuc » thuat thuc, nhan thuc, chat thai
hieu van » hieu va, lieu va, hieu ve
don vai » don vi, don va, den vai
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
va don » va dong, va doc, va do
san ky » sang ky, van ky, dan ky
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang xa hoi. ((hieu van) or (thien van)) chat thuc va don vai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang xa hoi. ((hieu van) OR (thien van)) chat thuc va don vai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang xa hoi. ((hieu van) or (thien van)) chat thuc va don vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang xa hoi. ((hieu van) or (thien van)) chat thuc va don vai ((cua tre) OR (cuu tre))*.