Perhaps you should try some spelling variations:
"function of a complete variable" » "function of a komplexe variable", "function of a complete verifiable", "function of a complex variables"
"functions of a complex variable" » "functions of a complex variables"

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: (("functions of a complex variable") OR ("function of a complete variable")).
• Removing quotes may allow a broader search: (( functions of a complex variable ) or ( function of a complete variable )).
• Adding a wildcard symbol may retrieve word variants: (("functions of a complex variable") or ("function of a complete variable"))*.