Thank you both for your reply.
you can use baka updates and then use the results here.
https://www.mangaupdates.com/series.html?act=genresearch
here you could use 'manga directory'. you can search multible words but for the summary. for example yaoi, vampire http://www.mangago.zone/r/l_search/?name=yaoi%2C+vampire or yaoi, angst, brother http://www.mangago.zone/r/l_search/?name=yaoi%2C+angst%2C+brother
Thank you very much, ivy. (づ￣ ³￣)づ
This will help a lot.
ヾ(❀╹◡╹)ﾉ~
Is there a way to search for two tags in one go? Would be a lot easier to find a special story.