Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
sac ky » sai ky
cam tu » cam thu, nam tu, tam tu
dam tu » nam tu, tam tu, dam thuc
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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: tu ((sac ky) OR (cac ky)) nang x hoi. hieu ve ((cam tu) OR (dam tu)) va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (cac ky)) nang x hoi. hieu ve ((cam tu) OR (dam tu)) va hanh vi cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) nang x hoi. hieu ve ((cam tu) OR (dam tu)) va hanh vi cua triet*.