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