Perhaps you should try some spelling variations:
critical aspects » clinical aspects, political aspects, practical aspects
optical aspects » political aspects, tactical aspects, ethical aspects
imaging africa » reimaging africa, making africa, imagining african

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: "technology ((optical aspects) OR (critical aspects)) imaging africa".
• Adding a wildcard symbol may retrieve word variants: technology ((optical aspects) OR (critical aspects)) imaging africa*.