Perhaps you should try some spelling variations:
"level using algorithms" » "level cosine algorithm" (Expand Search), "level fusion algorithms" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural colony algorithm" (Expand Search), "neural scheduling algorithm" (Expand Search)
"element rf algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rf 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: (("level using algorithms") OR ((("element rf algorithm") OR ("neural coding algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"level using algorithms\") OR (((\"element rf algorithm\") OR (\"neural coding algorithm\"))))".
• Removing quotes may allow a broader search: (( level using algorithms ) OR ((( element rf algorithm ) OR ( neural coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("level using algorithms") OR ((("element rf algorithm") OR ("neural coding algorithm"))))*.