Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
lap cua » lai cua, tap cua, lam cua
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
ve cac » vien cac
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: so sach ky dang ((mai hoi) OR (xa hoi)). hieu ((ve cac) OR (va cac)) duc va thanh lap cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dang ((mai hoi) or (xa hoi)). hieu ((ve cac) OR (va cac)) duc va thanh lap cua te~".
• Adding a wildcard symbol may retrieve word variants: so sach ky dang ((mai hoi) or (xa hoi)). hieu ((ve cac) OR (va cac)) duc va thanh lap cua te*.