Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
cac lop » cac hop, cac loai
cac loc » cac toc, cac hoc, cac nuoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
can ky » van ky, dan ky, ban ky
tu can » tu ban, tu cac, thu canh

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

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