Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified charging aided algorithm" » "modified caging aided algorithm", "modified carbon aided algorithm", "modified charging adam algorithm", "modified charging driven algorithm", "modified charging winner algorithm", "modified learning aided algorithm", "modified charging pile algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified charging aided algorithm") OR ("modified notion approximation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified charging aided algorithm\") OR (\"modified notion approximation algorithms\"))*".
• Removing quotes may allow a broader search: (( modified charging aided algorithm ) OR ( modified notion approximation algorithms ))*.