Perhaps you should try some spelling variations:
"h. likert scale investment period" » "h. likert scale investment policy", "h. likert scale adjustment period", "h. likert scale investment operations", "h. likert estate investment period", "h. likert estate investments period"
"h. kent trade investment series" » "h. kent trade investment services", "h. kent trade investment barriers", "h. kent trade investment treaties", "h. kent private investment series", "h. kent estate investment series", "h. kent trade adjustment series", "h. net trade investment series", "h. best trade investment series", "h. nest trade investment series"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("h. kent trade investment series") or ("h. likert scale investment period"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("h. kent trade investment series") OR ("h. likert scale investment period")).
• Removing quotes may allow a broader search: (( h. kent trade investment series ) or ( h. likert scale investment period )).
• Adding a wildcard symbol may retrieve word variants: (("h. kent trade investment series") or ("h. likert scale investment period"))*.