Perhaps you should try some spelling variations:
iii services » iii service, ii services, ai services
anti series » anti caries, anti siris, ni series
2c series » 2 series, 21 series, 22 series
c series » c serious, c server

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: "%22nato ((anti series) OR (iii services))%((2c series) OR (c series)) 3%a high technology%22".
• Adding a wildcard symbol may retrieve word variants: %22nato ((anti series) OR (iii services))%((2c series) OR (c series)) 3%a high technology%22*.