Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vi » hanh vi, dinh vi, danh di
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
xac va » tac va, ac va, bac va
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam

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) OR (mai hoi)). hieu ve cam ((xac va) or (luc va)) danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cam ((xac va) OR (luc va)) danh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cam ((xac va) or (luc va)) danh vi cua triet*".