Perhaps you should try some spelling variations:
development tool » development tools, development toolkit, development theory
esg development » big development, using development, drug development
de integration » die integration, re integration, une integration
techniques de » techniques _, techniques 6, techniques 3
a month » _ month
a esg » _ esg, 3 esg

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "techniques de integration 3 ((a month) OR (6 months)) communication a esg development tool africa.~".
• Adding a wildcard symbol may retrieve word variants: techniques de integration 3 ((a month) OR (6 months)) communication a esg development tool africa.*.