Perhaps you should try some spelling variations:
"dose estimation algorithms" » "dose estimation algorithm", "dose optimization algorithms", "dose optimisation algorithm", "pose estimation algorithms", "cover estimations algorithms", "pulses estimation algorithms"
"risk estimation algorithms" » "risk estimation algorithm", "risk optimization algorithms", "risk optimisation algorithm", "pose estimation algorithms"
"_ optimized algorithm" » "_ optimized algorithms", "_ 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: (((("dose estimation algorithms") OR ("risk estimation algorithms"))) or ("_ optimized algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dose estimation algorithms") OR ("risk estimation algorithms"))) OR ("_ optimized algorithm")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dose estimation algorithms\") OR (\"risk estimation algorithms\"))) or (\"_ optimized algorithm\"))".
• Removing quotes may allow a broader search: (((( dose estimation algorithms ) OR ( risk estimation algorithms ))) or ( _ optimized algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("dose estimation algorithms") OR ("risk estimation algorithms"))) or ("_ optimized algorithm"))*.