Keyword Analysis & Research: how do you combine pdfs into one document

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
how do you combine pdfs into one document	0.55	0.5	7540	34	41
how	0.79	0.2	5778	90	3
do	1.67	0.7	3747	61	2
you	1.97	1	1324	13	3
combine	1.53	0.9	617	32	7
pdfs	1.16	0.6	5148	22	4
into	1.79	0.6	7064	95	4
one	0.06	0.7	7760	23	3
document	1.64	0.7	5013	20	8

Keyword	CPC	PCC	Volume	Score
how do you combine pdfs into one document	1.96	0.2	9115	12