In addition to Google and Bing, there are other alternative search engines, such as 2Lingual, with which you can find content and facilities not available on Google.
What is interesting about 2Lingual is the fact that the basic search technology is Google Search, so you will not lose quality, but you will get something more, which is not offered by Google's standalone tool.
Users can choose from a wide range of languages and get results for two different search languages side by side. Of course it also supports the Greek language. From our brief experience with this tool, we can say with certainty that it works quite well, so we have no problem recommending it.