Perhaps you should try some spelling variations:
"binary state level optimization algorithm" » "binary state based optimization algorithm" (Expand Search), "binary rat level optimization algorithm" (Expand Search)
"binary rats global optimization algorithm" » "binary rat global optimization algorithm" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"binary rats global optimization algorithm\") OR (\"binary state level optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( binary rats global optimization algorithm ) OR ( binary state level optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("binary rats global optimization algorithm") OR ("binary state level optimization algorithm"))*.