Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
dao duc » giao duc, tao duoc
vai cua » dai cua, hai cua, lai cua
ang xa » lang xa, mang xa, dang xay
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) y ang xa hoi. hieu ve ((pham duc) or (dao duc)) van thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y ang xa hoi. hieu ve ((pham duc) OR (dao duc)) van thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y ang xa hoi. hieu ve ((pham duc) or (dao duc)) van thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y ang xa hoi. hieu ve ((pham duc) or (dao duc)) van thanh vai cua te*.