With the onset of cloud computing, data holders are inspired to deploy their miscellaneous data management systems to the commercial public cloud for extreme flexibility and utility. Sensitive data have to be encrypted before outsourcing, in-order to assure data privacy. This obscures traditional data usage based on plain-text keyword search. This makes it essential to provide a service to search encrypted cloud data. Plaintext key word is replaced by multiple keywords; consider the huge amount of data holders and documents in the cloud. In this paper, the asserting problem of searching encrypted cloud data using ranked multi-keyword is defined and solved.