Perhaps you should try some spelling variations:
ban lanh » ban hanh, ban linh, ban anh
danh xay » dang xay, manh xay, anh xay
hieu van » hieu va, thien van, lieu va
lai cua » lai chau, thai cua
hai cua » thai cua, hoi cua, hai quan
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang
cac duc » cac du, cao duc, cac dac

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 danh xay hoi. hieu van cac duc ban lanh ((((hai cua) OR (lai cua))) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky danh xay hoi. hieu van cac duc ban lanh ((((hai cua) OR (lai cua))) OR (dai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky danh xay hoi. hieu van cac duc ban lanh ((((hai cua) OR (lai cua))) or (dai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky danh xay hoi. hieu van cac duc ban lanh ((((hai cua) OR (lai cua))) or (dai cua)) triet*.