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