Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cuu tre, cua triet, dua tren
xay hoi » tay hoi, cay phoi, gay thoi
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
tu san » thu san, tu ban, tu can
ve cac » va cac, vien cac
san ky » sang ky, van ky, dan ky
cua te » cua tu
ky va » ly va, ke va, my va

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 va ((xay hoi) OR (xa hoi)). hieu ve cac xuc va hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky va ((xay hoi) OR (xa hoi)). hieu ve cac xuc va hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky va ((xay hoi) OR (xa hoi)). hieu ve cac xuc va hanh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu san ky va ((xay hoi) OR (xa hoi)). hieu ve cac xuc va hanh vi ((cua tre) or (cua te))*.