Multiple keywords with "easy search"

help
1 
export const Projects = new Mongo.Collection('projects');

projectIndex = new EasySearch.Index({
    collection: Projects,
    fields: ['title', 'subtitle','tags','jobs'],
    engine: new EasySearch.MongoDB({
      sort: function () {
        return { createdAt: -1 }
      },
      
    
    })
  });

Template.landingPage.helpers({
  index: function () {
    return [projectIndex];   
  },
 projectIndex: function () { return projectIndex; },
  
});

The search works but only for one keyword :confused:
How can i filter multiple keywords, like many tags, or combine title with tags etc. :(?
It should work like a tag filtering