Perhaps you should try some spelling variations:
information documentation » international documentation, information presentation, information documents
documentation papers » documentation makes, documentation peter, documentation chapter
functions esf » functions egfr, functions e, functions e.l
function esf » function e, function ec, function em
liver » river

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information documentation papers ((function esf) OR (functions esf)) liver~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information documentation papers ((function esf) OR (functions esf)) liver".
• Adding a wildcard symbol may retrieve word variants: information documentation papers ((function esf) OR (functions esf)) liver*.