Perhaps you should try some spelling variations:
"engineering augustin" » "engineering august", "engineering acoustics", "engineering acquisition"
"engineering counting" » "engineering accounting", "engineering coating", "engineering coupling"
"engineering agenten" » "engineering agent", "engineering agents", "engineering augmented"
"engineering robust" » "engineering roles", "engineering rose", "engineering risk"

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: (((((("engineering augustin") OR ("engineering agenten"))) OR ("engineering robust"))) OR ("engineering counting")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"engineering augustin\") OR (\"engineering agenten\"))) or (\"engineering robust\"))) or (\"engineering counting\"))".
• Removing quotes may allow a broader search: (((((( engineering augustin ) OR ( engineering agenten ))) or ( engineering robust ))) or ( engineering counting )).
• Adding a wildcard symbol may retrieve word variants: (((((("engineering augustin") OR ("engineering agenten"))) or ("engineering robust"))) or ("engineering counting"))*.