Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
su sach » vu sach
so sach » so sanh, bo sach, co sach
san cua » sang cua, ban cua, dan cua
ve cao » ve bao, ve cac, ve co
va cao » va cac, va co, va dao
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc va thanh san cua te~.
• 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) OR (va cao)) duc va thanh san 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) OR (va cao)) duc va thanh san cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. hieu ((ve cao) OR (va cao)) duc va thanh san cua te*.