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

Try widening your search to All Fields.

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

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