Perhaps you should try some spelling variations:
construction efforts » conservation efforts, construction errors, construction export
generation reforms » generation records, federation reform, generation platforms
urban construction » during construction, dam construction
trade generation » trace generation, fragen generation, case generation
supply trade » supply case

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

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