According to the screenshot you shared, the three keywords that could match to the search were 1. +volunteer +travel 2. +volunteer +trips 3. +volunteer +holidays. The last two have the reason you are asking about, and it means exactly what it says: another keyword is a better fit/match, so those two keywords won’t represent your account in the auction.
The KW that won the “internal auction” in your account was #1 +volunteer +travel. However, because the ad rank is low on that KW, its bid isn’t sufficient for it to win any place in the auction and show an ad in the search. So, you can either improve your QScore with ads/LP improvements, or you can increase the bids on that KW.