Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
thu san » thuy san, thu ban, phu san
nang ma » tang ma, sang ma, nang cao
van cau » van dau, van hau, van chat
va hanh » van hanh, va thanh, va danh
tu san » tu ban, tu can, vu san
ma hoi » mai hoi, xa hoi, ma hoa
cau tu » dau tu, cau truc
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 san) OR (thu san)) ky nang ma hoi. hieu van cau tu va hanh vi ((cua te) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (thu san)) ky nang ma hoi. hieu van cau tu va hanh vi ((cua te) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (thu san)) ky nang ma hoi. hieu van cau tu va hanh vi ((cua te) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (thu san)) ky nang ma hoi. hieu van cau tu va hanh vi ((cua te) or (cua triet))*.