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

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