Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
va hanh » van hanh, va thanh, va danh
tu ban » thu ban, te ban
ban ky » van ky, dan ky
ma hoi » mai hoi, xa hoi, me hoi
cam tu » cam thu, nam tu, dam tu
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky nang ((ma hoi) OR (ma hoa)). hieu van cam tu va hanh vi ((cua te) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky nang ((ma hoi) OR (ma hoa)). hieu van cam tu va hanh vi ((cua te) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky nang ((ma hoi) OR (ma hoa)). hieu van cam tu va hanh vi ((cua te) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu ban ky nang ((ma hoi) OR (ma hoa)). hieu van cam tu va hanh vi ((cua te) or (cua triet))*.