Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vai » thanh hai, thanh van, thanh tai
ngay doc » ngay do, ngay moi, ngay de
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
le hang » le hoang, le thang, le hong
lo hang » ly hang, cho hang, le thang

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 ((lo hang) or (le hang)) xa hoi. hieu va ((nay duc) OR (ngay doc)) gia thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((lo hang) OR (le hang)) xa hoi. hieu va ((nay duc) OR (ngay doc)) gia thanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((lo hang) or (le hang)) xa hoi. hieu va ((nay duc) OR (ngay doc)) gia thanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((lo hang) or (le hang)) xa hoi. hieu va ((nay duc) OR (ngay doc)) gia thanh vai cua triet*.