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

Try widening your search to All Fields.

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\"))))".
• Removing quotes may allow a broader search: (( 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"))))*.