Perhaps you should try some spelling variations:
ban lanh » ban hanh, ban linh, ban anh
cay phoi » cap phoi, tay hoi, cay cho
cac duc » cac du, cao duc, cac dac
hai cua » thai cua, hoi cua, lai cua
duc ban » duc tan, duc van, dua ban
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, gay thoi
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky dang ((xay hoi) or (cay phoi)). hieu ve cac duc ban lanh ((hai cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky dang ((xay hoi) OR (cay phoi)). hieu ve cac duc ban lanh ((hai cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky dang ((xay hoi) or (cay phoi)). hieu ve cac duc ban lanh ((hai cua) or (dai cua)) triet*.