Be concise! E.g. use "bird New Zealand" instead of "bird images taken in New Zealand" or "half-timbered house black forest" instead of "half-timbered houses in the black forest" etc.
The match any word option allows you to broaden your search to several words that can be similar or synonymous in meaning. E.g. conducting such a search with "sunset dusk" produces more results than a search with "sunset" or "dusk" alone.
landmark London
The match all words option is designed to help you narrow down your search. Searching for "bird New Zealand" produces results that are less numerous and more specific compared to a search with "bird" alone.
You can also limit your search to images that have a particular orientation (vertical or horizontal) or that are black and white. E.g to find black and white images of landmarks in London type "landmark London" and tick the b/w only box.