Perhaps you should try some spelling variations:
tinh lai » tinh lao, tinh hai, minh lai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang ((ma hoi) OR (mai hoi)). hieu ve pham duc va tinh lai ((dung trong) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang ((ma hoi) OR (mai hoi)). hieu ve pham duc va tinh lai ((dung trong) or (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: te sach ty hang ((ma hoi) OR (mai hoi)). hieu ve pham duc va tinh lai ((dung trong) or (cua tre))*.