Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
cua triet » cua viet, su triet, va triet
van pham » san pham, van phan, van phat
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
va pham » va phat, va phap, va phan
duc ban » duc tan, duc van, dua ban
cac cua » cach cua, cac qua, ca cua
ha hoi » hoa hoi, ha noi, xa hoi

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 ((ky lang) or (ky dang)) ha hoi. hieu ((va pham) OR (van pham)) duc ban thanh cac cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) ha hoi. hieu ((va pham) OR (van pham)) duc ban thanh cac cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky dang)) ha hoi. hieu ((va pham) OR (van pham)) duc ban thanh cac cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) ha hoi. hieu ((va pham) OR (van pham)) duc ban thanh cac cua triet*.