Perhaps you should try some spelling variations:
"advanced recurrent engineering" » "advanced current engineering", "advanced concurrent engineering", "advanced recent engineering", "advanced recurrences engineering", "enhanced recurrent engineering"
"advanced content engineering" » "advanced concepts engineering", "advanced control engineering", "advanced concurrent engineering", "advanced client engineering"

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: (("advanced content engineering") OR ("advanced recurrent engineering")).
• Removing quotes may allow a broader search: (( advanced content engineering ) or ( advanced recurrent engineering )).
• Adding a wildcard symbol may retrieve word variants: (("advanced content engineering") or ("advanced recurrent engineering"))*.