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

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