Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
minh ve » dinh ve, minh va, kinh ve
cam tuc » cam tu, nam thuc, dam thuc
hieu va » lieu va, hieu qua
hoi hoi » hoi hoc, hoc hoi, hoi doi
xac ky » cac ky, sac ky, bac ky
ho hoi » hoc hoi, hoa hoi, co hoi
su xac » pu xac, su cac
ve va » ve van, te va, ke va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky nang ((ho hoi) OR (hoi hoi)). hieu va ((cam tuc) OR (cam xuc)) van minh ve va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ((ho hoi) or (hoi hoi)). hieu va ((cam tuc) OR (cam xuc)) van minh ve va triet~".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((ho hoi) or (hoi hoi)). hieu va ((cam tuc) OR (cam xuc)) van minh ve va triet*.