Perhaps you should try some spelling variations:
"The computer service" » "The computing service", "The computing services", "The computer science"
"the complex services" » "the complex service", "the composed services", "the complex surfaces"
"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 computer service")))).
• Removing quotes may allow a broader search: (( the complex series ) or ((( the complex services ) or ( The computer service )))).
• Adding a wildcard symbol may retrieve word variants: (("the complex series") or ((("the complex services") or ("The computer service"))))*.