Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dua tren » dung tren
nang xa » nang x, lang xa, nang ma
nam xuc » cam xuc, nam xua, nam thuc
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac
su xac » pu xac, su cac
xuc va » duc va, tuc va, luc va
vi dua » vi du, vi dum, vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su xac)) ky nang xa hoi. hieu van nam xuc va hanh vi dua tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky nang xa hoi. hieu van nam xuc va hanh vi dua tren".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky nang xa hoi. hieu van nam xuc va hanh vi dua tren*.