Hi @vunguyen and @melisse,
Firstly, you shouldn’t modify the theme’s files. If you do, your changes will be lost when you upgrade every so often. Making changes may also cause issues that we will be unable to provide support for.
Any custom CSS code you have develop should be placed on the Custom CSS box in Appearance > Theme Options > Custom CSS.
If you’re referring to a page like this: http://para.llel.us/themes/moxie-wp/portfolio/duis-zutem-ariure/
You can hide all of the text details (apart from the title) by placing the code below in your Custom CSS box.
body.single-portfolio #primary #content .row-fluid {
display: none !important;
}