Perhaps you should try some spelling variations:
"modified invasive evolutionary algorithm" » "modified invasive evolution algorithm", "modified invasive solution algorithm", "modified passive evolutionary algorithm"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation algorithms"

Try widening your search to All Fields.

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

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