Unable To Search #% Reduced Duration, #% Increased Effect On Trade Site

Basically title, trying to search for a silver flask with increased effect and don't see it as a stat I can filter by. Have tried variations with -ve numbers, i.e. #% increased duration or #% reduced effect, like with the shock affix, but no results.

Found this flask on trade site for reference:

Item Class: Utility Flasks
Rarity: Magic
Abecedarian's Silver Flask of the Sanderling
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Lasts 3.70 (augmented) Seconds
Consumes 40 of 60 Charges on use
Currently has 0 Charges
Onslaught
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Requirements:
Level: 50
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Item Level: 84
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38% reduced Duration
25% increased effect
56% reduced Effect of Shock on you during Effect
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Right click to drink. Can only hold charges while in belt. Refills as you kill monsters.

Never mind I figured it out. There are two stat filters which are '#% increased effect', one of them works.

Also, for anyone else who has this issue, you also need to set a min roll of 1 so you don't get things like "#% increased charge recovery, #% reduced effect"