Now when I search for the term "voest", then it does not give any results.
I have tried it here at the Test-Forum (since it says in your FAQ that xenforo.com is indeed using Elastic Search) and searched for the term "voest", but it also does not give me any search-results.
I thought ElasticSearch is building and using their own indices for search? Can anyone let me know if you can search 2 letters keywords with XenForo Enhanced Search? If you cannot, this is a major showstopper, as many large forums rely on on small keywords. I'm going to install the product now and see what options we have available. Thanks for letting me know.
Note that the XenForo Enhanced Search add-on, which is installed here on XenForo.com, does not suffer the same constraints as default MySQL search does with regards to minimum word length and stop words. The stopwords for elasticsearch are listed here.