Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
cuu tre » cua tre, cau tren, cau treo
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc 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 sac ky lang xa hoi. hieu ve cac xuc va hanh vi ((((dua tren) OR (dung tren))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ve cac xuc va hanh vi ((((dua tren) OR (dung tren))) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. hieu ve cac xuc va hanh vi ((((dua tren) OR (dung tren))) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ve cac xuc va hanh vi ((((dua tren) OR (dung tren))) or (cuu tre))*.