It could be a member of Moraceae family

I think, what we see in the  picture, is not fruits or flowering, but it is some gall formation only. Identification is not possible in such cases

Probably a species of Diospyros where gall formation is a common feature

No, 

species of Diospyros have not the same inflorescence.

I agreed with Arvind Singh it is a member of Moraceae family

It's small photos for help you

I think that is a Rubiaceae, maybe a Morinda. You can check it in MBG-TROPICOS: http://www.tropicos.org, like Morinda citrifolia. Good luck.

I don't think that it is Morinda citrifolia because in Morinda the phyllotaxy is opposite while this plant has alternate phyllotaxy.

Hi Md. Mustafizur Rahman, you could check if any botanist are active in the area you found the plant on http://www.inaturalist.org/. iNaturalist is a community for identification of organisms.

IT May be some Rhamnacea

This plant could be Castanopsis tribuloides(Sm.)A. DC. (Fagaceae)

Please check.

Possibly cynipid wasp galls on Castanopsis tribuloides (various types of galls reported on other Castanopsis species from China).