Perhaps you should try some spelling variations:
networks synthesis » network synthesis, networks systems, nets synthesis
health science » health sciences
walk synthesis » wall synthesis, mask synthesis, work synthesis
science walk » sciences wals, science talks, science work
health guide » health guido, earth guide, health side
health grid » health guido, health gis, health good

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: (( health science walk synthesis report ) OR ( ((health guide) OR (health grid)) networks synthesis report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( health science walk synthesis report ) or ( ((health guide) OR (health grid)) networks synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (( health science walk synthesis report ) or ( ((health guide) OR (health grid)) networks synthesis report ))*.