We recommend that you maintain only one keyword per db center.uk ad group, thus avoiding negative keyword conflicts across all your AdWords campaigns.
That's why PPC Keyword Tool comes with a unique feature that allows you to easily remove negative cross-referenced keywords with one click, using the "1 kw = 1 gr" option.
negative keywords
Before you can enable this feature, make sure you split your keyword lists into campaigns. Use the filter bar to find all the keywords that contain the relevant terms, add them to the different campaigns by clicking the Actions button and choosing the Move to group option.
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Now you can go ahead and easily remove negative cross-referenced keywords across all your campaigns with Semrush’s PPC Keyword Tool.
Create the perfect keyword list

with PPC Keyword Tool
Use Semrush to create targeted PPC campaigns with negative keyword lists
The bottom line is: if you need to use generic keywords to get more traffic, make sure you have a large negative keyword list to avoid irrelevant traffic from people searching for something other than what you offer.
Focus on searches that are likely to generate conversions and start optimizing your targeting with Semrush! You have nothing to lose and everything to gain.