Perhaps you should try some spelling variations:
using control » losing control, dosing control, pumping control
than change » chain change, can change, mean change
control bi » control b, control 5, control 4
wang qian » wang qiao, wang qin, wang liang
qian kang » qian wang, qian rong, qian yan
han chang » huang chang, can change, chin chang

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 qian kang ((han chang) OR (than change)) chuan using control bi ;~.
• Adding a wildcard symbol may retrieve word variants: wang qian kang ((han chang) or (than change)) chuan using control bi ;*.