I would like to have questionnaires analyzed to identify similarities and differences in couples.
You can simply use Microsoft Excel and its filters.
Filter the data and click on the filter of the colum where similiar texts are. After that use "contains" filter and put a kew after the last column of your data.
Excel is a great tool that you can use it also for grouping the data and analyse it.
It dependa on which phase of your study you are but google form is a great tool also.