Perhaps you should try some spelling variations:
"introduction engineering" » "production engineering", "information engineering", "construction engineering"
"introduction monitoring" » "production monitoring", "introduction configuring", "introduction modeling"
"introduction entering" » "introduction enabling", "introduction engaging", "introduction enterprise"

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