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

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