Perhaps you should try some spelling variations:
ban banh » ban hanh, ban anh, ban danh
hieu van » hieu va, thien van, lieu va
cau xuc » cam xuc, cau luc, cau truc
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
van cau » van dau, van hau, van chat

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 ((nang ma) OR (tang ma)) hoi. hieu van cau xuc ban banh ((vai cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ma) OR (tang ma)) hoi. hieu van cau xuc ban banh ((vai cua) OR (hai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang ma) OR (tang ma)) hoi. hieu van cau xuc ban banh ((vai cua) or (hai cua)) triet*".