Perhaps you should try some spelling variations:
"modified seird optimization algorithms" » "modified seird optimisation algorithm", "modified seird estimation algorithms", "modified seird estimation algorithm", "modified stage optimization algorithms", "modified network optimization algorithms", "modified near optimization algorithms"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified seird optimization algorithms") or ("modified notion approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified seird optimization algorithms") OR ("modified notion approximation algorithms")).
• Removing quotes may allow a broader search: (( modified seird optimization algorithms ) or ( modified notion approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified seird optimization algorithms") or ("modified notion approximation algorithms"))*.