I'm writing a report in japanese. And I want to change the subject a bit, but I don't know what words to use to connect paragraphs but without being sudden. 

Please look at the following list of words. Do you know any site where I can study more from? I don't know the term neither in english nor in japanese so I can't really search.

ところが
そこで
それでは
つまり
したがって

Thanks in advance!

(I'll edit the title as soon as I know the exact term)