Is there a good website to plan bus and train transportations in France Benelux and Germany?
You should give the new http://www.goeuro.com/ a try. It doesn't always work on all platforms (browsers), but when it does, their search results are quite comprehensive.
There are two multi-modal travel search engines that I'm aware of that handle this well. Perhaps you can compare the results to see which one is what you would prefer.
Best worldwide coverage in my view is Rome2rio. Here's an example search from Amsterdam to Hamburg. Their coverage in Europe is very comprehensive as data is much easier to come by there than other parts of the world.
To me the most notable differences would be
- Rome2Rio offers more options (including rideshare)
- GoEuro offers more accurate pricing and tighter integration at checkout
- Rome2Rio returns results faster (the trade-off being less accurate pricing)
Finally, it is worth mentioning Google Maps can also do this kind of search now, but there is no pricing shown (yet).