some index files failed to download ubuntu

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
some index files failed to download ubuntu	0.3	0.1	6454	27	42
some	0.16	0.9	6479	92	4
index	0.67	0.8	2132	26	5
files	0.56	0.5	866	65	5
failed	1.16	0.8	1289	10	6
to	1.04	0.6	5922	22	2
download	1.42	0.2	2940	71	8
ubuntu	1.91	0.3	8216	72	6

Keyword	CPC	PCC	Volume	Score
some index files failed to download ubuntu	1.43	0.8	5007	99
some index files failed to download	1.95	0.5	7681	75
some index files failed to download debian	0.06	0.6	7064	53
index file download failed	1.9	0.8	1393	79
failed to index files	1.12	0.6	3615	81
failed to download index	0.06	0.3	3704	93
fail to download index	1.9	0.9	2043	33
failed to download index eclipse	0.25	1	9174	30
fail to locate the index files	1.16	0.4	7229	27
failed to download package files ubuntu	0.39	0.4	3593	88
failed to download version index	1.96	0.9	9865	96
failed to download index file flowframes	0.22	0.8	5667	20
unable to index file	1.2	0.3	1448	66
unable to find index file	1.42	0.8	311	1
error unable to index file	0.03	0.4	7499	4
index of ubuntu releases	0.69	0.9	6792	73
problem with index file	1.05	0.2	1469	38