Perhaps you should try some spelling variations:
"modified response approximation algorithm" » "modified response approximation algorithms", "modified one approximation algorithm", "modified response association algorithm"
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithms", "modified parameters estimation 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 response approximation algorithm") OR ("modified parameters optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified response approximation algorithm\") OR (\"modified parameters optimization algorithms\"))".
• Removing quotes may allow a broader search: (( modified response approximation algorithm ) OR ( modified parameters optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified response approximation algorithm") OR ("modified parameters optimization algorithms"))*.