Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"machines making methods algorithm" » "machines using methods algorithm", "machines learning methods algorithm", "machines graining methods algorithm"

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: (("machines making methods algorithm") or ("modified multiobjective optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("machines making methods algorithm") OR ("modified multiobjective optimization algorithms")).
• Removing quotes may allow a broader search: (( machines making methods algorithm ) or ( modified multiobjective optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("machines making methods algorithm") or ("modified multiobjective optimization algorithms"))*.