Perhaps you should try some spelling variations:
"comparative management practices history" » "compensation management practices history", "comparative management practice history", "comparative management prices history", "comparative management practices historical"
"comparative experiment references factors" » "comparative experiments references factors", "comparative experience references factors", "comparative experiences references factors"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("comparative management practices history") or ("comparative experiment references factors"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comparative management practices history") OR ("comparative experiment references factors")).
• Removing quotes may allow a broader search: (( comparative management practices history ) or ( comparative experiment references factors )).
• Adding a wildcard symbol may retrieve word variants: (("comparative management practices history") or ("comparative experiment references factors"))*.