Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang tai » hang va, dung tai
cam tuc » cam tu, nam thuc, dam thuc
ky sang » ky nang, ky dang, ky tang
va hang » van hang, va nang, va lang
hieu va » lieu va, hieu qua
tai va » thai va, mai va, tri va
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, me hoi

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 ky sang ((ma hoi) OR (ma hoa)). hieu va ((cam tuc) or (cam xuc)) va hang tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky sang ((ma hoi) OR (ma hoa)). hieu va ((cam tuc) OR (cam xuc)) va hang tai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky sang ((ma hoi) OR (ma hoa)). hieu va ((cam tuc) or (cam xuc)) va hang tai va triet*".