Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thuc dan, thu ban
ban danh » ban doanh, ban hanh, ban dan
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
va cua » va chua, via cua, ma cua
ca cua » co cua
x hoi » xa hoi, o hoi, x ho
ve am » va am

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) or (sach y)) nang x hoi. hieu ve am thuc ban danh ((va cua) OR (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang x hoi. hieu ve am thuc ban danh ((va cua) OR (ca cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang x hoi. hieu ve am thuc ban danh ((va cua) OR (ca cua)) triet*".