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