Perhaps you should try some spelling variations:
"h. likert scale investment services" » "h. likert scale government services", "h. likert scale treatment services", "h. likert scale investment choices", "h. likert estate investment services", "h. likert estate investments services"
"h. likert trade investment series" » "h. likert trade investment barriers", "h. likert trade investment treaties", "h. likert trade investment schemes", "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 investment services") or ("h. likert trade investment series"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("h. likert scale investment services") OR ("h. likert trade investment series")).
• Removing quotes may allow a broader search: (( h. likert scale investment services ) or ( h. likert trade investment series )).
• Adding a wildcard symbol may retrieve word variants: (("h. likert scale investment services") or ("h. likert trade investment series"))*.