"find their origin" is correct and usable in written English.
You can use the phrase when you want to refer to the source of something, such as a person's roots or a concept's development. For example, "Folklorists have been attempting to find the origin of the popular nursery rhyme for years."
Many of Spain's difficulties find their origin in the home-grown speculative construction bubble of the early 2000s.
Indeed, many ideas widely held about the workings of salvation (especially regarding the saints, angels, the devil, and the powers of nature) find their origin in legendary episodes rather than biblical text.
The principles underpinning these programmes find their origin in documents such as the Habitat Agenda and the Millennium Development Goals.
In his view, migrant businesses find their origin in the interplay of opportunity structures, group characteristics, and strategies for adapting to the urban environment.
Although iterative methods for solving linear systems find their origin in the early 19th century (work by Gauss), the field has seen an explosion of activity spurred by demand due to extraordinary technological advances in engineering and sciences.
In the traditions that find their origin in the Indian subcontinent chiefly Hinduism, Buddhism, and Jainism the object of religious experiences is some basic fact or feature of reality, rather than some entity separate from the universe.
He said that that could reveal the dietary and environmental causes of species change, leading eventually to modern humans with the ambition to find their origins.
Both find their origins in sympathetic magic, in fertility rituals, in the human instinct to act out that which one wishes to take place in reality.
The collaborations find their origins in oral and written reportage, and in war-time stories from veterans of the world wars and the recent and current conflicts in Iraq and Afghanistan.
Nobles nowadays sighed, 'the barbarians followed Han's language and forgot their own origins".'He went on to write, "Most of this generation of the Shandong clans find their origins in the Jin and Yuan".
Calls for such measures are much more likely to find their origins in the architects of neoliberalism, central bank economists and ministers of finance and trade, the very same constituencies that have been calling for measures to ensure disciplined fiscal policy, privatisation and liberalisation.
