Perhaps you should try some spelling variations:
comparative economic » comparative genomics
comparative genomic » comparative genomics
task comparative » talk comparative, taste comparative, risk comparative
bank comparative » dark comparative, talk comparative, banking comparative
tank comparative » talk comparative, dark comparative, mutans comparative
genomic studies » genetic studies
world task » world tasks, worlds task, world mask
world tank » world tasks, world frank, world trans

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( the world task comparative economic studies ) OR ((( the world bank comparative genomic studies ) OR ( the world tank comparative genomic studies )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the world task comparative economic studies ) or ((( the world bank comparative genomic studies ) OR ( the world tank comparative genomic studies ))))".
• Adding a wildcard symbol may retrieve word variants: (( the world task comparative economic studies ) or ((( the world bank comparative genomic studies ) OR ( the world tank comparative genomic studies ))))*.