Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cam tuc » cam xuc, cam tu, nam thuc
hoc hoi » hoc khoi, hoc hoa, hoc noi
minh te » minh ve, minh de, minh tu
hoi hoi » hoi hoc, hoi doi, doi hoi
hieu va » lieu va, hieu qua
su xac » pu xac, su cac
tuc va » thuc va, truc va, tuc xa
xac ky » cac ky, sac ky, bac ky
va cam » va cham, va cac, va cao

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 ((hoc hoi) OR (hoi hoi)). hieu va cam tuc va ((minh te) OR (kinh te)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky nang ((hoc hoi) or (hoi hoi)). hieu va cam tuc va ((minh te) OR (kinh te)) va triet~".
• Adding a wildcard symbol may retrieve word variants: su xac ky nang ((hoc hoi) or (hoi hoi)). hieu va cam tuc va ((minh te) OR (kinh te)) va triet*.