Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh tri » chinh tri
hieu van » hieu va, thien van, lieu va
hieu ve » hieu va
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
su sach » so sach, vu sach
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: su sach ky nang ma hoi. ((hieu ve) OR (hieu van)) cam ((duc va) or (tuc va)) dinh tri cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoi. ((hieu ve) OR (hieu van)) cam ((duc va) OR (tuc va)) dinh tri cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoi. ((hieu ve) OR (hieu van)) cam ((duc va) or (tuc va)) dinh tri cua triet*".