Perhaps you should try some spelling variations:
cost computing » cloud computing
trading cost » trading costs, training cost, trading case
hua credit » dual credit, ida credit, rural credit
wang yang » wang yan, wang liang, wang yanling
yang yala » yang yang
a credit » _ credit, tax credit, bad credit

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yala ((hua credit) or (a credit)) trading cost computing shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yala ((hua credit) OR (a credit)) trading cost computing shu ;*.