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