Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
su sach » so sach, vu sach
sai cua » dai cua, hai cua, lai cua
xa danh » va danh, dia danh, nam danh
hieu le » hieu ve, hieu ly, tieu le
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu he » hieu ve, hiem he, hieu hien
mai hoi » mai khoi, dai hoi, lai hoi
thu xa » thu xac, thu ha, thu xe
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: su sach ky nang ((ma hoi) or (mai hoi)). ((hieu he) OR (hieu le)) nam thu xa danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (mai hoi)). ((hieu he) OR (hieu le)) nam thu xa danh sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) or (mai hoi)). ((hieu he) OR (hieu le)) nam thu xa danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) or (mai hoi)). ((hieu he) OR (hieu le)) nam thu xa danh sai cua tre*.