Is there a fast way to do a '%phrase%' search in any DB?

String richText = richTextBox1.Text;
String ValToSearchFor = "duckbilledPlatypus";
int pos = 0;
pos = richText.IndexOf(ValToSearchFor, 0);
while (pos != -1) {
    richTextBox1.Select(pos, ValToSearchFor.Length);
    richTextBox1.SelectionColor = Color.Red;
    pos = richText.IndexOf(ValToSearchFor, pos + 1);
}

Query query = TextQuery.queryText(TextCriteria.forDefaultLanguage().matchingAny("search term").sortByScore().with(new PageRequest(pageNum, docCount, new Sort(new Order(Sort.Direction.DESC, "score"))));

@TextScore
private Float score;

query.addCriteria(Criteria.where("city").is("Delhi").and("country").is("India").and("price").lte(200.50).gte(100.50);

List<Product> products = mongoOperations.find(query, Product.class)

$query = "
SELECT *, LOWER(CONCAT_WS(title,description)) AS concatenated 
WHERE concatenated LIKE LOWER('%iPhone Mobiles Access%')";

$query = "
    SELECT *, LOWER(CONCAT_WS(title,description)) AS concatenated 
    WHERE concatenated LIKE LOWER('%iphone mobiles access%')";

COLLATE UTF8_BIN

(?s)<Text[^>]*? Name="Back".*?>.*?<\/Text>