Will the United Nations be able to help?

I highly doubt it.

There are tensions between Cambodia and Thailand over land. This piece of land contains the ancient Preah Vihear Hindu temple. Thai troops have apparently crossed into Cambodian territory and both sides have deployed thousands of troops.

Tensions High as Cambodia Claims Thailand Has Violated Territory in Temple Dispute: "Cambodia complained to the U.N. Security Council that Thai forces have violated its territory near a World Heritage Site temple, as more than 4,000 troops from the two sides were deployed in the border region Sunday."

If the UN manages to help settle this dispute I will be pleasantly surprised. But when I look at UN "successes" in Rwanda, the Sudan, and the middle east (Iran has certainly "slowed" their nuclear weapons program) excuse me for being skeptical.