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