Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
than duc » tran duc, phan duc, than doc
va chua » vua chua, ca chua, va chu
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va than » va thanh, van than, va phan
co cua » con cua, ca cua, cong cua

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) or (thu hoach)) ky lang xa hoi. hieu va than duc ban thanh ((va chua) or (co cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky lang xa hoi. hieu va than duc ban thanh ((va chua) OR (co cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky lang xa hoi. hieu va than duc ban thanh ((va chua) or (co cua)) triet*.