Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
liang wei » xiang wei, zhang wei, wang wei
cost data » test data
wang you » want you, wang yong, chang you
wei cost » der cost, eu cost, ii cost
job wong » job done
wong sau » wong sam, wong siu, wong shiu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang you) OR (wang yang)) liang wei cost data job wong sau ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang you) or (wang yang)) liang wei cost data job wong sau ;*.