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