Perhaps you should try some spelling variations:
thanh vang » thanh van, thanh hang, thanh hoang
van thanh » ban thanh, van tuan
vang cua » mang cua, hang cua, tang cua
ly quang » le quang, vu quang
su sach » so sach, vu sach
cao duc » dao duc, cao suc, giao duc
ly vang » ly hang, ly van
hieu ve » hieu va, hieu van
cam duc » cam xuc, pham duc, nam duoc
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: su sach ((ly vang) OR (ly quang)) xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vang cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly vang) OR (ly quang)) xa hoi. hieu ve ((cam duc) OR (cao duc)) van thanh vang cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly vang) OR (ly quang)) xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vang cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly vang) OR (ly quang)) xa hoi. hieu ve ((cam duc) or (cao duc)) van thanh vang cua te*.