Heard Cambodia was once the biggest empire in South East Asia.. what happened to them now?

Question

Will she once again be that BIG of an empire that they once were?

Answer 1

"Cambodia is the successor state of the once powerful Hindu and Buddhist Khmer Empire, which ruled most of the Indochinese Peninsula between the eleventh and fourteenth centuries.
The first advanced civilizations in present day Cambodia appeared in the 1st millennium ce. During the 3rd, 4th, and 5th centuries, the Indianised states of Funan and Chenla coalesced in what is now present-day Cambodia and southwestern Vietnam. These states, which are assumed by most scholars to have been Khmer, had close relations with China and India. Their collapse was followed by the rise of the Khmer Empire, a civilization which flourished in the area from the 9th century to the 13th century.
Though declining after this period, the Khmer Empire remained powerful in the region until the 15th century. The empire's center of power was Angkor, where a series of capitals was constructed during the empire's zenith. Angkor Wat, the most famous and best preserved religious temple at the site, is a symbolic reminder of Cambodia's past as a major regional power.
After a long series of wars with neighbouring kingdoms, Angkor was sacked by the Thai and abandoned in 1432. The court moved the capital to Lovek where the kingdom sought to regain its glory through maritime trade. The attempt was short-lived, however, as continued wars with the Thai and Vietnamese resulted in the loss of more territory and the conquering of Lovek in 1594. During the next three centuries, The Khmer kingdom alternated as a vassal state of the Thai and Vietnamese kings, with short-lived periods of relative independence between."

Will they ever become a large empire again in the future? Who knows? Personally I doubt it.

Answer 2

Government ran amuck probably..