"Các nhà khoa học thường xuyên tìm thấy các vật thể trong hang này."

Translation: The scientists usually find objects in this cave.

[Jake469719]

Isn't it more correct to say "hang dong" than hang

[TehVanarch]

The term hang động is more-so speaking of them in general and more formal. A lot of times you'll come across pairings in Vietnamese of two homophonous morphemes. Sometimes it will pair a Northern and Southern equivalent. e.g. ly cốc = glasses (of water) where ly is Southern and cốc is Northern.

[HaoLien]

"The scientists usually find THE objects in this cave." That was rejected for the extra "the".