Perhaps you should try some spelling variations:
development services » development agencies, development process, development africa
aqaba environmental » global environmental, trade environmental, urban environmental
development series » development agencies, development africa, development strategies
sustainable urban » sustainable use
technical paper » technical experts, technical report
central aqaba » central asia, central java
a technical » _ technical, 2 technical
world a » world _, world war

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

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