As much as I hate to admit it, Google still gives the best search results most of the time.
I get BETTER results from DDG most of the time.
I often try google when a ddg search doesn't turn up what I want, and either google: A) Only turns up some spam pages that ddg did not, or B) Ignores some of my search terms, and inundates me with irrelevant nonsense.
Only two thing I can think of that Google does betters. 1) Searching for EXACT file names and 1) More aggressively guessing you might have meant to search for popular term X instead of the correctly spelled but less popular word Y.
Having said that, the first example I thought up off-the-cuff shows the opposite in reality... A search for "googol" on DDG guesses you might want "Google", while the same search on Google does NOT suggest a correction.