Perhaps you should try some spelling variations:
administrative reforms » administrative costs
tax administrative » tax administration, a administrative, das administrative
situ conservation » bird conservation, nature conservation, land conservation
supply situ » supply side, supply shifts, supply sides
supply tax » supply a, supply trade

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: (( supply tax administrative reforms. ) OR ( supply situ conservation efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply tax administrative reforms. ) or ( supply situ conservation efforts. ))*.