[throwaway125]

I have noticed the same problem when adding several search terms and ddg ignoring the one that is the most important. I have found that if you quote that term it returns better results that do include that term.

For your particular example if you search for 'usb type c "resistor"' you get (what I assume to be) reasonable results: https://duckduckgo.com/?q=usb+type+c+"resistor"

Ideally duckduckgo should recognize which of the search terms are defining, but until that happens quoting should help you out.