Hi, guys, does anyone know if I can travel abroad after send my application?

yes you can, but under the same rules as when you applied - no more then 6 months, or if 6 to 12 - with proof of residency in US, and total of months spent inside of US has to remain more then half of required 3 or 5 years.

If the travel is immediate, I see no problem. If it is planned for later on down the line, make sure there is someone to monitor your mail, for citizenship test/interview dates from USCIS. With the protracted timelines for Naturalisation, it would be a shame to miss one.

you can travel abroad, but don't over stay you get more issue with your case when u come back

Yes, you can travel, subject to the same restrictions that were in effect before you filed. In addition to what others have said, keep track of your dates, and keep documentary evidence of them (passport stamps, plane tickets, etc.).

At the naturalization interview, they'll go over the N-400 with you, and they'll ask if any of the information needs to be updated based on things that have happened after you filed. They'll update the travel dates you filled out, and recalculate your days outside the US to make sure you still meet the physical presence requirements. You'll want to bring a written record of your travel dates with you, so you don't have a fit of nervousness and say, "I left on the sunday before my birthday, let's see, that would have been the 28th -- no wait, the 27th..."