Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cam truc » cau truc, nam truc, lam truoc
truc van » truc va, thuc van, truc ban
minh de » menh de, minh ve, sinh de
minh te » kinh te, minh ve, minh tu
hoi hoi » hoi hoc, hoc hoi, hoi doi
hieu ve » hieu va, hieu van
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
ho hoi » hoc hoi, hoa hoi, co hoi
ve cam » ve cham, ve cac, va cam

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 ve cam truc van ((minh te) OR (minh de)) 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 ve cam truc van ((minh te) OR (minh de)) va triet~".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((ho hoi) or (hoi hoi)). hieu ve cam truc van ((minh te) OR (minh de)) va triet*.