Perhaps you should try some spelling variations:
investment treaties » investment strategies, investment activities, investment incentives
treatment services » payment services
special treatment » surgical treatment, medical treatment, equal treatment
world investment » road investment, fixed investment
impact world » impact work, impact bond, impact covid
a special » _ special

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

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