Perhaps you should try some spelling variations:
information requirements » nutrition requirements, irrigation requirements, information environments
requirements patterns » requirement patterns, requirements water, requirements chapter
functions euler » functions error, functions e.l, functions ecole
functions egfr » functions esf, functions error, functions e

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

• Performing a fuzzy search may retrieve terms with similar spellings: information requirements patterns ((functions euler) or (functions egfr)) (gives or lines)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information requirements patterns ((functions euler) OR (functions egfr)) (gives OR lines).
• Adding a wildcard symbol may retrieve word variants: information requirements patterns ((functions euler) or (functions egfr)) (gives or lines)*.