Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ve triet » va trien
su triet » su viet, su tien
le hoang » le hong, le quang, le tang
va thanh » gia thanh, ban thanh, va tinh
nay duc » ngay doc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lo hang » ly hang, le hang, cho hang
va nay » va ngay, va cay

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