Perhaps you should try some spelling variations:
"context of qca technology choice problem" » "context of qca technology ict problem", "context of a technology choice problem", "context of _ technology choice problem", "context of sdn technology choice problem", "content of qca technology choice problem"
"context of qca technology mobile problem" » "context of a technology mobile problem", "context of _ technology mobile problem", "context of sdn technology mobile problem", "content of qca technology mobile problem"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("context of qca technology choice problem") OR ("context of qca technology mobile problem"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"context of qca technology choice problem\") OR (\"context of qca technology mobile problem\"))".
• Removing quotes may allow a broader search: (( context of qca technology choice problem ) OR ( context of qca technology mobile problem )).
• Adding a wildcard symbol may retrieve word variants: (("context of qca technology choice problem") OR ("context of qca technology mobile problem"))*.