Perhaps you should try some spelling variations:
development services » development agencies, development process, development africa
aqaba environmental » global environmental, trade environmental, urban environmental
technical experts » technical expertise
sustainable rural » sustainable use, sustainable resource
sustainable urban » sustainable use
technical paper » technical report
central aqaba » central asia, central java

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

• Performing a fuzzy search may retrieve terms with similar spellings: world bank ((technical paper) or (technical experts)). europe and central aqaba environmental and socially ((sustainable rural) OR (sustainable urban)) development services.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: world bank ((technical paper) OR (technical experts)). europe AND central aqaba environmental AND socially ((sustainable rural) OR (sustainable urban)) development services..
• The words AND, OR and NOT may confuse the search; try adding quotes: "world bank ((technical paper) or (technical experts)). europe and central aqaba environmental and socially ((sustainable rural) OR (sustainable urban)) development services.".
• Adding a wildcard symbol may retrieve word variants: world bank ((technical paper) or (technical experts)). europe and central aqaba environmental and socially ((sustainable rural) OR (sustainable urban)) development services.*.