Perhaps you should try some spelling variations:
"sphere optimisation algorithm" » "sphere optimization algorithms", "sphere estimation algorithm", "sphere estimation algorithms"
"_ optimizer algorithms" » "_ optimized algorithm", "_ optimization algorithms"
"_ optimized algorithms" » "_ optimized algorithm", "_ optimization algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("_ optimizer algorithms") or ("_ optimized algorithms"))) or ("sphere optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ optimizer algorithms") OR ("_ optimized algorithms"))) OR ("sphere optimisation algorithm")).
• Removing quotes may allow a broader search: (((( _ optimizer algorithms ) or ( _ optimized algorithms ))) or ( sphere optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("_ optimizer algorithms") or ("_ optimized algorithms"))) or ("sphere optimisation algorithm"))*.