Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
va kinh » va tinh, qua kinh
toi cac » voi cac, ton cac, hoi cac
tai cac » tai cuc
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ma hoi » mai hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
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 can ky nang ((ma hoi) or (xa hoi)). hieu ve cam xuc va kinh ((toi cac) OR (tai cac)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ((ma hoi) OR (xa hoi)). hieu ve cam xuc va kinh ((toi cac) OR (tai cac)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang ((ma hoi) or (xa hoi)). hieu ve cam xuc va kinh ((toi cac) OR (tai cac)) viet".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((ma hoi) or (xa hoi)). hieu ve cam xuc va kinh ((toi cac) OR (tai cac)) viet*.