searchText.js

const normalize = str => str.normalize('NFD').replace(/[\u0300-\u036f]/g, '');

let text = "Lorem Ipsum íís simply dummy tééxt of the printing and typesetting industry.";
let termSearch = 'lorem iss';

text = normalize(text).toLowerCase();
termSearch = normalize(termSearch).toLowerCase();

multiSearchAnd: 
  (text, searchWords) => 
    searchWords.every(word => text.match(new RegExp(word,"i")));

multiSearchOr: 
  (text, searchWords) => 
    (new RegExp(searchWords.join("|"),"gi")).test(text);
              
multiSearchAnd(text, termSearch.split(' '));
multiSearchOr(text, termSearch.split(' '));