Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh tai, thanh oai
thanh van » thanh san, thanh toan, thanh phan
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
vang xa » lang xa, mang xa, ang xa
y vang » ly vang
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 y vang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh vai) OR (thanh van)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y vang xa hoi. hieu ve ((pham duc) OR (cao duc)) van ((thanh vai) OR (thanh van)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y vang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh vai) OR (thanh van)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y vang xa hoi. hieu ve ((pham duc) or (cao duc)) van ((thanh vai) OR (thanh van)) cua te*.