Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
border irrigation » holder irrigation, under irrigation, border integration
supply border » supply under
re training » _ training, term training, job training
a training » _ training, a trading, job training

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 ((a training) OR (re training)) services. ) OR ( supply border irrigation schemes. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply ((a training) OR (re training)) services. ) or ( supply border irrigation schemes. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply ((a training) OR (re training)) services. ) or ( supply border irrigation schemes. ))*.