AND & OR operator
Google API can seach for "<WORD1>" AND/OR "<WORD2>" in the HTML document body/title. But Bing API do not enforce that both words must be present in the document body/title. It would be good if Bing API can search both words in the document body/title as same as Google API.
There are several operators you can use. Feel free to explore and try them. For AND and OR: