Perhaps you should try some spelling variations:
22national science » thenational science, irrational science, national sciences
citational science » irrational science, relational science, computational science
rational science » regional science, traditional science, rational defence
national science » natural science, spatial science, animal science

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