Perhaps you should try some spelling variations:
"modified motion optimisation algorithmss" » "modified motion optimisation algorithm", "modified motion optimization algorithms", "modified motion estimation algorithms", "modified motion estimation algorithmss"
"modified objective approximation algorithm" » "modified objective approximation 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 motion optimisation algorithmss\") OR (\"modified objective approximation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified motion optimisation algorithmss ) OR ( modified objective approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified motion optimisation algorithmss") OR ("modified objective approximation algorithm"))*.