There are two options how to search in the two existing data-bases (Primary literature and Secondary literature):
You can either search via "Fulltext" or "Specific Field"
Via Fulltext-search you can search in all fields or start a combined search. The list of results will contain the complete data-sets. Additionally, you can also select and print the results.
Via "Specific Field", the information on the results is limited to the bibliographical data and the content of the specific field in which you have searched.
Further information via "Help" (see above)