You will probably get better results with an adjective for your area-specific keyword. Your efforts should quickly will be rewarded with some very useful hits. Bookmark the best directories you find and use them when you need to conduct a search. As you spend more time online and become more familiar with the best online resources in a given interest area, you may stumble across even better resource pages for relevant organizations. Either way, your searches will become faster and more productive.
Experience pays a big dividend on the Internet.