Dear doctor Jamil Obaid, you may have a try to apply for Bill and Melinda Gates Foundation for developing countries. I knew a few Yemeni professors who were awarded this grant but in the field of epidemiology. Please have a look at their website for more details.
Develop a convincing proposal, and then reach-out to potential funders. Transnational funding is rare. You may need to look for local funders, unless the problem you are addressing is of global interest to someone like the Gates Foundation.