Perhaps you should try some spelling variations:
rational science » traditional science, rational defence, educational science
national science » spatial science, animal science, natural sciences
natural science » natural sciences

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: %((((rational science) OR (((national science) OR (natural science))))) OR (((regional science) OR (regional scale)))) foundation%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((rational science) or (((national science) OR (natural science))))) or (((regional science) or (regional scale)))) foundation%22".
• Adding a wildcard symbol may retrieve word variants: %((((rational science) or (((national science) OR (natural science))))) or (((regional science) or (regional scale)))) foundation%22*.