Perhaps you should try some spelling variations:
mathematics environment » mathematics engagement, informatics environment, mathematics development
environment heated » environment related, environment heat, environment mediated
micro ordinateur » micro ordinateurs, par ordinateur
mini ordinateurs » micro ordinateurs, des ordinateurs

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

• Performing a fuzzy search may retrieve terms with similar spellings: mathematics environment heated ((micro ordinateur) OR (mini ordinateurs)) informatique~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mathematics environment heated ((micro ordinateur) OR (mini ordinateurs)) informatique".
• Adding a wildcard symbol may retrieve word variants: mathematics environment heated ((micro ordinateur) OR (mini ordinateurs)) informatique*.