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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("risk optimized algorithm") OR ("write optimized algorithm"))) or ("_ estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("risk optimized algorithm") OR ("write optimized algorithm"))) OR ("_ estimation algorithms")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"risk optimized algorithm\") OR (\"write optimized algorithm\"))) or (\"_ estimation algorithms\"))".
• Removing quotes may allow a broader search: (((( risk optimized algorithm ) OR ( write optimized algorithm ))) or ( _ estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("risk optimized algorithm") OR ("write optimized algorithm"))) or ("_ estimation algorithms"))*.