Perhaps you should try some spelling variations:
"multi-objective optimization self ii" » "multi-objective optimization scheme ii", "multi-objective optimization solving ii", "multi-objective optimization self iii"
"multi-objective optimization sql iii" » "multi-objective optimization set iii", "multi-objective optimization some iii", "multi-objective optimization soft iii"
"multi-objective optimization seo ii" » "multi-objective optimization some ii", "multi-objective optimization section ii", "multi-objective optimization scheme ii", "multi-objective optimization seo im"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"multi-objective optimization self ii\") OR (\"multi-objective optimization sql iii\"))) OR (\"multi-objective optimization seo ii\"))".
• Removing quotes may allow a broader search: (((( multi-objective optimization self ii ) OR ( multi-objective optimization sql iii ))) OR ( multi-objective optimization seo ii )).
• Adding a wildcard symbol may retrieve word variants: (((("multi-objective optimization self ii") OR ("multi-objective optimization sql iii"))) OR ("multi-objective optimization seo ii"))*.