Perhaps you should try some spelling variations:
"modified _ optimization algorithm" » "modified _ optimization algorithms", "modified _ optimisation algorithm", "modified _ estimation algorithm"
"modified saline evolution algorithm" » "modified saline solution algorithm", "modified saline evolutionary algorithm", "modified saline convolution algorithms", "modified sales evolution algorithm", "modified time evolution algorithm", "modified caging evolution algorithm", "modified male evolution algorithm", "modified passive evolution algorithm"

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 _ optimization algorithm") OR ("modified saline evolution algorithm"))~.
• Removing quotes may allow a broader search: (( modified _ optimization algorithm ) or ( modified saline evolution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimization algorithm") or ("modified saline evolution algorithm"))*.