Perhaps you should try some spelling variations:
"experiments search algorithm" » "experiments each algorithm" (Expand Search), "experiments seap algorithm" (Expand Search), "experimental research algorithm" (Expand Search)
"level using algorithms" » "level pacing algorithms" (Expand Search), "level nine algorithms" (Expand Search), "level sorting algorithms" (Expand Search), "levels using algorithms" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)

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: (((("experiments search algorithm") OR ("level using algorithms"))) OR ("neural coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"experiments search algorithm\") OR (\"level using algorithms\"))) OR (\"neural coding algorithm\"))".
• Removing quotes may allow a broader search: (((( experiments search algorithm ) OR ( level using algorithms ))) OR ( neural coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("experiments search algorithm") OR ("level using algorithms"))) OR ("neural coding algorithm"))*.