Perhaps you should try some spelling variations:
treatment services » payment services
social investment » capital investment, initial investment
scale treatment » salt treatment, sewage treatment, seas treatment
investment ties » investment series, investment trends, investment trust
kept social » et social, net social, get social
kept scale » debt scale, likert scale

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( h. kept scale treatment services ) or ( h. kept social investment ties ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. kept scale treatment services ) OR ( h. kept social investment ties )).
• Adding a wildcard symbol may retrieve word variants: (( h. kept scale treatment services ) or ( h. kept social investment ties ))*.