Perhaps you should try some spelling variations:
"modified invasive optimization algorithms" » "modified invasive optimisation algorithm", "modified invasive estimation algorithms", "modified invasive estimation algorithm", "modified passive optimization algorithms"
"modified objective optimizer algorithms" » "modified objective optimized algorithms", "modified objective optimized algorithm", "modified objective optimal algorithms", "modified objective optimization algorithms"

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: "((\"modified objective optimizer algorithms\") OR (\"modified invasive optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective optimizer algorithms ) OR ( modified invasive optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimizer algorithms") OR ("modified invasive optimization algorithms"))*.