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