Perhaps you should try some spelling variations:
"primary risk based optimization algorithm" » "primary risk whale optimization algorithm" (Expand Search), "primary aim based optimization algorithm" (Expand Search), "primary role based optimization algorithm" (Expand Search)
"binary basic codon optimization algorithm" » "binary basic wolf optimization algorithm" (Expand Search), "binary mask codon optimization algorithm" (Expand Search), "binary basic column 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 risk based optimization algorithm") OR ("binary basic codon optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"primary risk based optimization algorithm\") OR (\"binary basic codon optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( primary risk based optimization algorithm ) OR ( binary basic codon optimization algorithm ))*.