Perhaps you should try some spelling variations:
technical experts » technical expertise
rich fertilizer » rice fertiliser, africa fertilizer, bio fertilizer
fertilizer type » fertilizer use
assessment 2 » assessment 4, assessment 1, assessment 2.1
assessment 3 » assessment 4, assessment 1, assessment 3.1

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

• Performing a fuzzy search may retrieve terms with similar spellings: rich fertilizer type ((assessment 2) OR (assessment 3)) technical experts.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "rich fertilizer type ((assessment 2) OR (assessment 3)) technical experts.".
• Adding a wildcard symbol may retrieve word variants: rich fertilizer type ((assessment 2) OR (assessment 3)) technical experts.*.