Perhaps you should try some spelling variations:
africa fertilizer » affect fertilizer, rich fertilizer, from fertilizer
technical report » technical experts, technical review
fertilizer type » fertilizer use
type assessment » time assessment, style assessments, cycle assessment
assessment esw » assessment east, assessment e6, assessment el

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