I have the following CAML query which works perfectly:
var emergencyCAML = "<View><Query><Where><And><Contains><FieldRef Name='Project_x0020_Members'/><Value Type='Note'>" + searchTerms[0] + "</Value></Contains><Contains><FieldRef Name='Project_x0020_Members'/><Value Type='Note'>" + searchTerms[1] + "</Value></Contains></And></Where><OrderBy><FieldRef Name='Title' Ascending='TRUE' /></OrderBy></Query></View>";
However, When I add the notIncludes it doesn't bring any results.
var emergencyCAML = "<View><Query><Where><And><Contains><FieldRef Name='Project_x0020_Members'/><Value Type='Note'>" + searchTerms[0] + "</Value></Contains><Contains><FieldRef Name='Project_x0020_Members'/><Value Type='Note'>" + searchTerms[1] + "</Value></Contains><NotIncludes><FieldRef Name = 'Hidden' LookupId='True'/><Value Type = 'Lookup'>" + _spPageContextInfo.userId + "</Value><XML /></NotIncludes></And></Where><OrderBy><FieldRef Name='Title' Ascending='TRUE' /></OrderBy></Query></View>";