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

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