Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
pham tu » phan tu, pham thi, pham tai
hieu ve » hieu va, hieu van
cham tu » cam tu, chai tu, chay tu
va hanh » van hanh, va thanh, va danh
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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