Perhaps you should try some spelling variations:
su sach » vu sach
san cua » sang cua, ban cua, dan cua
duc gia » quoc gia
so sach » so sanh, bo sach, co sach
nang o » nang co, nang ho, nang ro
ve cao » ve bao, ve cac, ve co
va cao » va cac, va co, va dao
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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) or (so sach)) ky nang o hoi. hieu ((ve cao) or (va cao)) duc gia thanh san cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang o hoi. hieu ((ve cao) OR (va cao)) duc gia thanh san cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang o hoi. hieu ((ve cao) or (va cao)) duc gia thanh san cua te*.