If some jobs do not appear in your search, please check your search criteria directly from the search bar.
You can click on the bin at the bottom right hand corner to completely reset your search.
You can also change your default criteria directly by clicking on "Edit my criteria" in your dashboard.
It is also possible that these jobs are only available in a language that is not activated for your profile. To change your languages, go to "Edit my criteria" from your dashboard.
Finally, if the job was communicated to you directly by a classmate, it is possible that it was not targeted to your course program. This means that you will not be able to find it in your results and you will not be able to apply for it.