Perhaps you should try some spelling variations:
"binary virus level optimization algorithm" » "binary virus global optimization algorithm" (Expand Search), "barr virus level optimization algorithm" (Expand Search)
"binary ni based optimization algorithm" » "binary gis based 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: (("binary ni based optimization algorithm") OR ("binary virus level optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"binary ni based optimization algorithm\") OR (\"binary virus level optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( binary ni based optimization algorithm ) OR ( binary virus level optimization algorithm ))*.