Perhaps you should try some spelling variations:
effect fertilizer » africa fertilizer, different fertilizer
affect fertilizer » africa fertilizer, different fertilizer
technical experts » technical expertise
trait assessment » gait assessment, trade assessment, frailty assessment
assessment ii » assessment 1, assessment 3, assessment 16
ii technical » iii technical, i technical, vi technical

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

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