Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"events after algorithm" » "events deer algorithm" (Expand Search)
"levels after algorithm" » "levels deer algorithm" (Expand Search), "level after algorithm" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("element sampling algorithm") OR ((("events after algorithm") OR ("levels after algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element sampling algorithm\") OR (((\"events after algorithm\") OR (\"levels after algorithm\"))))".
• Removing quotes may allow a broader search: (( element sampling algorithm ) OR ((( events after algorithm ) OR ( levels after algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element sampling algorithm") OR ((("events after algorithm") OR ("levels after algorithm"))))*.