[TYPO3-Solr] Solr finds too much subwords

[raka]

hi,

in general it's likeable that you can search for wordparts but as it is 
it's just over the top.
for example:
searching for "fisch" will result in many hits with 
"spezifisch","demografisch","biografisch",...
or a search for "affe" will result in "schaffen","beschaffenheit",...
of course there are also some useful results like "menschenaffen", 
"tintenfisch", ...
but as it is at the moment, it's just useless because there are far too 
many results that are simply wrong.

is it possible to disable this behaviour so that solr only finds the 
whole word, and perhaps the plural form and some grammatical cases?
or is it somehow possible to improve this matching?

thanks, raka