The search compares the search term with the contents of the category data by exact match for the catgories and partial match for the name and textual descriptions. Attention: Spaces may lead to different result, e.g. "Me 109" provides another result than "Me109". (you may combine several search terms, delimited by | )
Search results for <a href="https://archive.org/search.php?query=subject%3a%22world war%2c 1939-1945 -- naval operations%2c german%22" target="_blank">https://archive.org/search.php?query=subject:"world war, 1939-1945 -- naval operations, german"</a> dt. kriegstagebuch