Perhaps you should try some spelling variations:
information documentation » international documentation, information presentation, information documents
program definitions » problems definitions, program descriptions, problem definition
problem definitions » problem definition, process definitions
sources citrus » sources trust

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• Performing a fuzzy search may retrieve terms with similar spellings: information documentation ((program definitions) OR (problem definitions)) sources citrus~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information documentation ((program definitions) OR (problem definitions)) sources citrus".
• Adding a wildcard symbol may retrieve word variants: information documentation ((program definitions) OR (problem definitions)) sources citrus*.