Perhaps you should try some spelling variations:
"modified passive evolutionary algorithm" » "modified passive evolution algorithm", "modified passive solution algorithm", "modified adaptive evolutionary algorithm"
"modified seird estimation algorithms" » "modified seird estimation algorithm", "modified seird optimization algorithms", "modified seird optimisation algorithm", "modified sphere estimation algorithms", "modified risk estimation algorithms", "modified near estimation algorithms"

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

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