您的自定义搜索引擎可能已禁用图像搜索.如果请求的searchType被禁用，CSE API将返回0个结果.

Your Custom Search Engine might have Image Search disabled. The CSE API returns 0 results if the searchType requested is disabled.

您可以通过访问 https://cse.google.com/cse/all启用它>，打开您的搜索引擎，然后将图片搜索"切换到打开".

You can enable it by visiting https://cse.google.com/cse/all, opening your search engine, and switching the "Image Search" toggle to ON.