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

Try widening your search to All Fields.

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

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