Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh sai » dung sai, danh bat, danh dau
sai cua » dai cua, hai cua, lai cua
ha danh » han danh, hoa danh, ha anh
hieu ca » hieu cac, hieu cua, hieu va
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ha » hieu hoa, hieu va, hieu xa
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((ma hoi) or (mai hoi)). ((hieu ha) OR (hieu ca)) nam thu ha danh sai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (mai hoi)). ((hieu ha) OR (hieu ca)) nam thu ha danh sai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) or (mai hoi)). ((hieu ha) OR (hieu ca)) nam thu ha danh sai cua triet*".