访问此页面进行搜索：
https://github.com/search/advanced
再参考github高级搜索语法：
https://help.github.com/articles/search-syntax/
比如搜索C++最多star的projects:
https://github.com/search?l=C%2B%2B&o=desc&q=language%3AC%2B%2B&ref=advsearch&s=stars&type=Repositories&utf8=%E2%9C%93