Perhaps you should try some spelling variations:
"sleep tracking algorithm" » "sleep learning algorithm" (Expand Search), "sleep processing algorithm" (Expand Search)
"effects models algorithm" » "effects modeling algorithm" (Expand Search), "effects novel algorithm" (Expand Search), "effects modbo algorithm" (Expand Search)
"effects model algorithm" » "effects novel algorithm" (Expand Search), "effects forest 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: (("sleep tracking algorithm") OR ((("effects models algorithm") OR ("effects model algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sleep tracking algorithm\") OR (((\"effects models algorithm\") OR (\"effects model algorithm\"))))".
• Removing quotes may allow a broader search: (( sleep tracking algorithm ) OR ((( effects models algorithm ) OR ( effects model algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("sleep tracking algorithm") OR ((("effects models algorithm") OR ("effects model algorithm"))))*.