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