Age Difference
There are a lot of young beauties, trying to find a tower of strength, a husband, able to provide a good life level and education to future children and who could be a bread-winner in case of need(not all the women can find an appropriate job without language knowledge and without experience of living in a foreign country.

A lot of men "from West" that are above 40 match this ideal perfectly. Nevertheless it's not advisable to waste your time on correspondence with girls who are 20+ years younger than you. Most likely she will be interested in the beginning but than she will probably realize that you have too little in common. But if you're ready to keep on trying than you've got a chance to make things work. But isn't it better to find a woman who is a bit older but looks no worse than a young student but who's got life experience and rich inner world and who will sincerely cherish your relationships.