Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
tinh va » tich va, trinh van, trinh vat
cuu ban » cuu van, cua ban, cuu san
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
_ lang » _ land
o lang » hoa lang, hoi lang
va cua » va chua, via cua, ca cua
cua te » cua tu

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: tu sach ((o lang) OR (_ lang)) xa hoi. hieu ve cac ((duc ban) OR (cuu ban)) tinh va cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((o lang) or (_ lang)) xa hoi. hieu ve cac ((duc ban) or (cuu ban)) tinh va cua te*.