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

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