Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va cham » va tham
va chat » van chat, va phat, cao chat
duc ban » duc tan, duc van, dua ban
lai cua » hai cua, lai chau, thai cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. hieu ((va cham) or (va chat)) duc ban hanh ((lai cua) OR (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((va cham) OR (va chat)) duc ban hanh ((lai cua) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((va cham) or (va chat)) duc ban hanh ((lai cua) OR (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((va cham) or (va chat)) duc ban hanh ((lai cua) OR (dai cua)) triet*.