Perhaps you should try some spelling variations:
thanh sang » thanh san, thanh hang, thanh hoang
sang cua » mang cua, song cua, hang cua
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
duc ban » duc van, dua ban, duc man
ve cao » va cao, ve bao, ve cac
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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: ((su sach) OR (so sach)) ky nang x hoi. hieu ve cao ((duc ban) OR (duc tan)) thanh sang cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang x hoi. hieu ve cao ((duc ban) OR (duc tan)) thanh sang cua te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. hieu ve cao ((duc ban) OR (duc tan)) thanh sang cua te*.