Perhaps you should try some spelling variations:
"modified topology optimisation algorithm" » "modified topology optimization algorithms", "modified topology estimation algorithm", "modified topology optimization algorithm", "modified policy optimization algorithm"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective approximation algorithms", "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 topology optimisation algorithm") or ("modified objective estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified topology optimisation algorithm") OR ("modified objective estimation algorithms")).
• Removing quotes may allow a broader search: (( modified topology optimisation algorithm ) or ( modified objective estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified topology optimisation algorithm") or ("modified objective estimation algorithms"))*.