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

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 objective convolution algorithms\") OR (\"modified allocation optimisation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified objective convolution algorithms ) OR ( modified allocation optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective convolution algorithms") OR ("modified allocation optimisation algorithms"))*.