Perhaps you should try some spelling variations:
device context » service context, services context, device concepts
teaching china » teaching doing
china robert » china hubert, china expert, china recent
die context » does context, sme context, agile context
robert bin » robert b, robert n, robert i
ran ying » fan ying, tan ying, jin ying
ying vi » ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ran ying vi ((die context) or (device context)) teaching china robert bin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ran ying vi ((die context) OR (device context)) teaching china robert bin ;*.