Perhaps you should try some spelling variations:
conjunctive management » comparative management
detection equipment » injection equipment, electronic equipment, protective equipment
equipment element » requirement element, equipment management, equipment investment
element theory » movement theory
study history » story history, studies history, italy history

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( conjunctive management study history ) or ( detection equipment element theory ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( conjunctive management study history ) OR ( detection equipment element theory )).
• Adding a wildcard symbol may retrieve word variants: (( conjunctive management study history ) or ( detection equipment element theory ))*.