Perhaps you should try some spelling variations:
fertilizer trade » fertilizer trials, fertilizer usage, fertilizer price
technical report » technical support, technical experts, technical review
fertilizer type » fertilizer use
assessment esw » assessment east, assessment e6, assessment el
esw technical » ecm technical, ets technical, law technical

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

• Performing a fuzzy search may retrieve terms with similar spellings: africa ((fertilizer trade) or (fertilizer type)) assessment esw technical report.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: africa ((fertilizer trade) OR (fertilizer type)) assessment esw technical report..
• Adding a wildcard symbol may retrieve word variants: africa ((fertilizer trade) or (fertilizer type)) assessment esw technical report.*.