White space acts as an AND operator, while a single pipe (|) character acts as an OR operator. To escape white space, use double quote, for e.g., "scheme language" for exact match. For exact match in the single words, start with an apostrophe ('), for e.g., 'scheme.
Graduate students Yu Deng and Yiyan Lin have just won two Lewis Travel awards from the Department of Cell Biology, Johns Hopkins University School of Medicine. Congratulations, Yu and Yiyan!!