Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
ly quang » vu quang
le quang » vu quang
nam duoc » nam thuoc, da duoc, dat duoc
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
cua tu » cua tuc, cua su, cua cu

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 quang) OR (le quang)) xa hoi. hieu ve ((nam duoc) or (cao duc)) van thanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly quang) OR (le quang)) xa hoi. hieu ve ((nam duoc) OR (cao duc)) van thanh vai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly quang) OR (le quang)) xa hoi. hieu ve ((nam duoc) or (cao duc)) van thanh vai cua tu*".