Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh tri » chinh tri
su sach » so sach
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
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) OR (vu sach)) ky nang ma hoi. hieu ve 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) OR (vu sach)) ky nang ma hoi. hieu ve 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) OR (vu sach)) ky nang ma hoi. hieu ve cam ((duc va) or (tuc va)) dinh tri cua triet*".