Perhaps you should try some spelling variations:
"h. likert scale investments series" » "h. likert scale investment services", "h. likert scale investment period", "h. likert scale investment ties", "h. likert scale investment series", "h. likert estate investments series", "h. likert social investments series"
"h. likert trade investment series" » "h. likert trade investment services", "h. likert trade investment barriers", "h. likert trade investment treaties", "h. likert private investment series", "h. likert estate investment series", "h. likert trade adjustment series", "h. latent trade investment series"

Try widening your search to All Fields.

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

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