The solution is probably to change the implied OR from the default which is a space. In the code it would be this line:
WADbSearch1_whereClause=BuildKeyword(WADbSearch1_K eyArr0,"" & cStr(Request.Form("SearchBox")) & "","","Includes",",%20","%20","%22","%22",0,WADbSe arch1_wildCard,WADbSearch1_dateSeparator,WADbSearc h1_whereClause)
to:
WADbSearch1_whereClause=BuildKeyword(WADbSearch1_K eyArr0,"" & cStr(Request.Form("SearchBox")) & "","","Includes",",%20","%20OR%20","%22","%22",0,WADbSe arch1_wildCard,WADbSearch1_dateSeparator,WADbSearc h1_whereClause)