Perhaps you should try some spelling variations:
information documentation » international documentation, information presentation, information documents
documentation problems » documentation process, augmentation problems, documentation projects
functions e.l » functions ecole, functions euler, functions egfr
functions esf » functions egfr, functions ernst

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 problems ((functions e.l) OR (functions esf)) libris~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information documentation problems ((functions e.l) OR (functions esf)) libris".
• Adding a wildcard symbol may retrieve word variants: information documentation problems ((functions e.l) OR (functions esf)) libris*.