Can one recv () call get data from two consecutive send () calls?

I have a client that sends data to a server with two consecutive send calls:

send(_sockfd,msg,150,0);
send(_sockfd,msg,150,0);

and the server receives when the first send call was sent (let's say I use select):

recv(_sockfd,buf,700,0);

Notice that the buffer that I get is much larger.

my question is: is there any chance that buf will contain both msgs? Do I need 2 calls to recv () to receive both messages?

Thank you!