Perhaps you should try some spelling variations:
van phong » van dong, hai phong
van phan » van thanh, luan phan, van ban
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky

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. thien ((van phan) OR (van phong)) duc ban hanh vai ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang xa hoi. thien ((van phan) OR (van phong)) duc ban hanh vai ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang xa hoi. thien ((van phan) OR (van phong)) duc ban hanh vai ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang xa hoi. thien ((van phan) OR (van phong)) duc ban hanh vai ((cua tre) or (cua viet))*.