Perhaps you should try some spelling variations:
construction efforts » conservation efforts, construction errors, construction export
operations reforms » operations norms, operations networks, operations focus
dam construction » road construction
supply traffic » supply trophic
supply dam » supply data, supply farm, supply a

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply traffic operations reforms. ) or ( supply dam construction efforts. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply traffic operations reforms. ) OR ( supply dam construction efforts. )).
• Adding a wildcard symbol may retrieve word variants: (( supply traffic operations reforms. ) or ( supply dam construction efforts. ))*.