this is the story: suppose you have some files(files1,files2,files3) and some usergroup(ug1,ug2,ug3). and this is the struct file{ string name; set<string> group; } and file1.name = "file1"; file1.group.insert("ug1"); file1.group.insert("ug2"); file1.group.insert("ug3"); file2.name = "file2"; file2.group.insert("ug2"); file3.name = "file3"; file3.group.insert("ug3"); and i need search by file name or group, and file name should can be support fuzzy search (eg. *ile , *1 ....) can boost mutil index do this,if can ,what kind index need? or there is other way to do this?