Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cau » van dau, van hau, van chat
va hanh » van hanh, va thanh, va danh
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
ma hoi » mai hoi, xa hoi, me hoi
cau tu » dau tu, cau truc
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang ((ma hoi) or (ma hoa)). hieu van cau tu va hanh vi ((cua tu) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang ((ma hoi) OR (ma hoa)). hieu van cau tu va hanh vi ((cua tu) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang ((ma hoi) or (ma hoa)). hieu van cau tu va hanh vi ((cua tu) or (cua triet))*.