Perhaps you should try some spelling variations:
investment treaty » investment treaties, investment trusts, investment targets
notes investment » does investment, rates investment, forest investment
based investment » fixed investment, best investment, bond investment
investment fund » investment funds, investment bank, investment flows
rent notes » rest notes, agent notes, end notes

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( h. rent notes investment treaty ) OR ( h. agent based investment fund ))~.
• Adding a wildcard symbol may retrieve word variants: (( h. rent notes investment treaty ) or ( h. agent based investment fund ))*.