Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
tu sach » thu sach, su sach, te sach
vang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, tao duoc
vai cua » dai cua, hai cua, lai cua
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) OR (giao duc)))) van thanh vai 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) OR (giao duc)))) van thanh vai 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) OR (giao duc)))) van thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y vang xa hoi. hieu ve ((pham duc) or (((cao duc) OR (giao duc)))) van thanh vai cua te*.