Hyy I upload almost 750 image on adobe stock but not getting sales can any one know me the mistake

You have a lot of assets that are very similar to each other. Like 3 or more, but not terribly out of line with the recommended limit of three. But this effectively means you don't really have 750 distinctive images, but more like ~600 give or take. And that's not a lot, given that some contributors have a thousand or more before seeing sales. Also, with a few exceptions, I've seen similar images elsewhere in the database. So the competition is tough, especially when it comes to AI. With today's standards being what they are, many of these probably would have been rejected for being too similar to those already available, as many contributors are presently having literally dozens of assets rejected due to similarity to other images in the database, sometimes arguably without justification. I'd expand your horizons a bit going forward.

Most of your images are of subjects for which there are already many thousands of competitors. Abstract backgrounds, holiday stuff, multiple similars on a subject, etc. Have you tried searching for any your images in the Buyer portal using the titles and keywords you entered? Here are a couple of examples of useless, no -descriptive titles: