Perhaps you should try some spelling variations:
truoc van » truong van, truoc bang, truoc cang
va triet » va thiet, va trien, ve triet
truc van » truc va, thuc van, truc ban
minh te » kinh te, minh ve, minh de
hieu ve » hieu va, hieu van
hoi hoi » hoi hoc, hoc hoi, hoi doi
xac ky » cac ky, sac ky, bac ky
ve lam » va lam, de lam, se lam
co hoi » co hoc, co loi
su xac » pu xac, su cac
te va » tu 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 ((co hoi) OR (hoi hoi)). hieu ve lam ((truoc van) OR (truc van)) minh te va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ((co hoi) or (hoi hoi)). hieu ve lam ((truoc van) OR (truc van)) minh te va triet~".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((co hoi) or (hoi hoi)). hieu ve lam ((truoc van) OR (truc van)) minh te va triet*.