Perhaps you should try some spelling variations:
"primary data models optimization algorithm" » "primary data level optimization algorithm" (Expand Search), "primary data motor optimization algorithm" (Expand Search), "primary data mongoose optimization algorithm" (Expand Search)
"binary pdm driven optimization algorithm" » "binary pdm level optimization algorithm" (Expand Search), "binary pdm spider optimization algorithm" (Expand Search), "binary pdms driven optimization 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: (("primary data models optimization algorithm") OR ("binary pdm driven optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"primary data models optimization algorithm\") OR (\"binary pdm driven optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( primary data models optimization algorithm ) OR ( binary pdm driven optimization algorithm ))*.