Perhaps you should try some spelling variations:
"binary data structure optimization algorithm" » "binary rat structure optimization algorithm" (Expand Search), "binary data structural optimization algorithm" (Expand Search)
"binary risk 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 data structure optimization algorithm") OR ("binary risk based optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"binary data structure optimization algorithm\") OR (\"binary risk based optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( binary data structure optimization algorithm ) OR ( binary risk based optimization algorithm ))*.