I have found that the Opera mini can add and set the default search engine, well, may be this version of Opera (Opera for Android 22) didn't notice this. So, how to report this request to the Opera developer (like report a bug, although this is not a bug).

I mean I wanna make one of then in that search engine list as the default and not just let the first as the default. I have searched the fuck web, and I can't find the answer for Opera for Android...

The default search engine is Google, well, if I am not in China, this is the best choice. so, I'd like use another search engine like Bing or yahoo! I do know how to add a search engine to the search engine list, to do this, just long tap the search box and then add it. But everytime I open a new window, I have to choose another search engine in that list, if not the default is Google, well it's a little complecated...anyone can help me?