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Command search lets you perform precise searches using Boolean operators like AND, OR, and AND NOT to combine or exclude terms (e.g., fish AND potato, fish OR potato).
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It searches exact words by default, but you can use % to find variations (e.g., potato% for "potato," "potatoes").
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Limit searches to specific fields with codes: ti= for titles, em= for subjects, and fo= for authors (e.g., em=nutrition).
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Combine operators and field codes for advanced searches (e.g., potato% AND em=nutrition OR em=diet).
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