Perhaps you should try some spelling variations:
africa fertilizer » affect fertilizer, rich fertilizer, from fertilizer
fertilizer trade » fertilizer type, fertilizer usage, fertilizer price
technical report » technical support, technical experts
assessment esw » assessment east, assessment el, assessment egra
assessment ora » assessment a, assessment from, assessment data

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