Two more weeks vs. Two weeks more

I have two more weeks/days/years to finish the book
versus
I have more two weeks/days/years to finish the book.

There is a slight difference between them. 'Two more weeks' simply indicates that there are an additional two weeks available for finishing the report. 'Two weeks more' gives the idea that there is no need to worry because there are still another two weeks available. The difference is not really very great.

References:
English-test.net