Splitting a job into more than 2 parts

Hi!

Please, tell me, is there a possibility to split a job into more than 2 parts?

Is it possible to select several source languages? For example, there is a document in English to be translated into Russian, and in this document there is a sea in Chinese also to be translated.  

Is it possible to assign one and the same document to more than one vendor? For example, a test translation when several versions are required.