Perhaps you should try some spelling variations:
complex services » composed services, complex surfaces, compute services
complex service » computer service, compute service, component service
complex series » complex queries, complete series, compleat series

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: (( the complex series ) OR ((( The complex services ) OR ( The complex service )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the complex series ) or ((( The complex services ) OR ( The complex service ))))".
• Adding a wildcard symbol may retrieve word variants: (( the complex series ) or ((( The complex services ) OR ( The complex service ))))*.