The demining organization has helped clear some 160,000 square meters of mines, focusing mainly on the war-troubled northwest.
Hun Sen said Wednesday that if the court complaints went forward, the strikes would continue.
There are also sentiments here that the tribunal is already holding the wrong people.
The UN development goals aim at halving the world's poverty rate, promoting education and health and protecting the environment.
Obama said the US is focusing on economic trade and growth with Asean—a bloc of about 600 million people.
The US is strengthening its trade relations with Asean countries in a bid to boost its exports.
The US will provide $33.55 million in grant funds to reduce HIV and AIDS and prevent major diseases.
The strikes cost factories millions of dollars, and some companies have brought lawsuits in its wake.
The two are expected to meet again early next month in another Asean meeting in Europe, as well as Hanoi.
Sam Rainsy said the case involves both Cambodia and Vietnam, which makes it international in scope.
Cambodia already has consulates in Seattle, Wash., and Lowell, Mass., in addition to its embassy in Washington.
Protesters were concerned over Cambodia's human rights record and inability to solve longstanding border disputes with its neighbors.