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