Is team work attainable even if employees are multi national?

un-doubtedly Yes

Its just like five fingers different in size but to do something work together.

yes ..
but they will have some problem at first but later it will be perfect specially at works need to be creative

I go with the a post from Kamran here.
A team is a team, no matter where people come from.
Get an edge in dispute resolution as it happens everywhere.
If the team is not manageable at all, get daily reviews and go for individual targets rather than a team target and make everyone accountable.
Thanks NC.

Yes, through Goal setting.

Team work is attainable, when the clarity of objectiveor attainable Goal  is in every members minds. Team is formed by the like minded people with harmony to get the organization towards success and growth. If the goal is crystal clear then by default irrespective of cultural differences the destination is reached by the team. 

it is up to you not to them you just have to find that each one likes to work and has experience in which one of your jobs.
you are the real connection between can get positive work of them

Simple yes, it is not about cultures, it is about personalities

Set egos and politics aside.
Work with a clear and independent mind.
Enjoy and give your101% to what ever job you are handling, however small your job.