The full-text-search offers you to search keywords in all entries of all databases, except author search. That means, didactic pool, links, and literature list are searched in parallel.
Please use space to separate keywords. A keyword consits of at least three letters. Using "exact search" matches whole words, where as searching diffuse also matches parts of words e.g. "ant" in "elephant".
If you are looking for entries to a specific author, please use the » author serach.