Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
tinh vien » sinh vien, tinh dien, tinh viet
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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

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