Perhaps you should try some spelling variations:
"communications research vessel history" » "communication research vessel history", "implications research vessel history", "communications research messages history", "communications research overseas history", "communications research vehicle history", "communications research kassel history", "communications research lesser history", "communications research visual history"
"comparative management structures study" » "compensation management structures study", "comparative management strategies study", "comparative management studies study", "comparative management structures story", "comparative management structures sought", "comparative management structures strict"

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 structures study") or ("communications research vessel history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comparative management structures study") OR ("communications research vessel history"))*.
• Removing quotes may allow a broader search: (( comparative management structures study ) or ( communications research vessel history ))*.