SimilarityRank
problem_relate_to 0.718 33222
problem 0.714 185
such_problem 0.688 41208
various_issue 0.671 53974
related_problem 0.664 65450
specific_problem 0.661 57049
major_problem 0.640 34279
these_problem 0.635 12503
current_problem 0.633 54692
practical_problem 0.630 74534
serious_problem 0.619 48894
a_number_of_issue 0.597 81730
related_issue 0.590 33101
common_problem 0.588 56258
problem_with 0.586 3733
the_same_problem 0.584 37541
problem_associate_with 0.582 33102
problem_face 0.582 83674
major_issue 0.582 31720
solve_them 0.581 89467
the_main_problem 0.581 46787
another_problem 0.580 52607
various_challenge 0.576 99907
problem_cause_by 0.573 59711
this_problem 0.573 4064