Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
so sach » so sanh, bo sach, co sach
ty lang » tay lang, ty xang, tu lang
ty hang » ly hang, ty xang, thi hang
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
ve cap » ve cac, le cap, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty lang) or (ty hang)) xa hoi. hieu ve cap cuu van thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty lang) OR (ty hang)) xa hoi. hieu ve cap cuu van thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ((ty lang) or (ty hang)) xa hoi. hieu ve cap cuu van thanh vai cua triet*.