A "Hide Completed Translation/Proofreading" option is offered to users who used more points than the amount suggested when making a request. 

When this option is selected, the translation/proofreading will be hidden from all users other than the requester, including the selected translator/proofreader.

However, in the case of long texts that were divided into multiple requests, if points were offered below the suggested amount for even one of the requests, you will not be able to use the "Hide Completed Translation/Proofreading" option.