Perhaps you should try some spelling variations:
sequences methodological » sequential methodological (Expand search), sequencia metodologica (Expand search), science methodological (Expand search)
methodological problems » methodological process (Expand search), methodological profile (Expand search), methodological proposals (Expand search)
cdc sequences » cdna sequences (Expand search), coi sequences (Expand search), chu sequences (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
using python » usando python (Expand search), in python (Expand search)
using using » housing using (Expand search), aging using (Expand search), ring using (Expand search)
code cdc » code cpc (Expand search), code ctn (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( code cdc sequences methodological problems ) OR ( using using python python programming ))~.