JSFiddle - React, Tailwind, and code Playground

HTML

<input id="txtSearch" type="text" class="ProjectSearch" value="trend Micro" />
<input id="btnSearch" type="submit" value="Find" class="RunSearch" />
<div class="ProjectTaskGrid">Renew Trend Worry-Free Business Security license that will expire in 60 days
    <br/>Activate trend and confirm renewal upon electronic delivery notification from Trend Micro</div>

CSS

div {
    padding: 5px;
    border: solid 1px #CCC;
}
.search-found {
    background-color: #F7DE00;
    padding-left: 3px;
    padding-right: 3px;
    color: black !important;
}

JavaScript

$(document).ready(function () {
    $(".RunSearch").click(function (e) {
        if ($(".ProjectSearch").val().length > 0) {
            var searchedText = $(".ProjectSearch").val();
            var wordList = searchedText.split(" ");
            $.each(wordList, function (i, word) {
                $(".ProjectTaskGrid:contains('" + word + "')").each(function (i, element) {
                    var rgxp = new RegExp(word, "gi");
                    var repl = '<span class="search-found">$&</span>';
                    element.innerHTML = element.innerHTML.replace(rgxp, repl);
                });
            });
        }
    });
});