Perhaps you should try some spelling variations:
"based compositional data string problem" » "base compositional data string problem" (Expand search), "based compositions data string problem" (Expand search), "varied compositional data string problem" (Expand search), "based compositional data sizing problem" (Expand search), "based compositional data rostering problem" (Expand search), "based compositional data sharing problems" (Expand search), "based compositional data sharing problem" (Expand search), "based compositional data sorting problem" (Expand search), "based compositional data during problem" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based compositional data string problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( based compositional data string problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based compositional data string problem") OR ("using coding python python programming"))*.