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 dau » van dao, phan dau
va hanh » van hanh, va thanh, va danh
tu san » tu ban, tu can, vu san
ma hoi » mai hoi, xa hoi, ma hoa
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 dau 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 dau 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 dau tu va hanh vi ((cua te) or (cua triet))*.