Database fulltext search words with minus "-" character

It would be helpful if you could elaborate what configuration you have already tried. In any case, in theory you should have little more to do than configure the Tokenizer processor to either strip minusses (i.e., include them as an ignored character – alternatively you could also use the “Ignore characters” processor for that) or to treat them as normal text (i.e., neither ignore them nor treat them as whitespace).
However, there is tons of other code that might interfere, I admit, so it can be tricky to get tokenizing and searching working exactly as you want it.