Perhaps you should try some spelling variations:
yang ping » yang jing, yang liang, yang using
dong cao » dong xiao, dan cao, dong nan
pong yue » wong yue, hong yu, wang yue
yaa how » data how
sin » sign, sind, skin
using » usigng, usindg, usking
usindg » usigndg, usinddg, uskindg
best » west

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong cao) or (dong sin)) yaa how best ((yang ping) or (yang (using OR usindg))) pong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong cao) OR (dong sin)) yaa how best ((yang ping) OR (yang (using OR usindg))) pong yue ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong cao) or (dong sin)) yaa how best ((yang ping) or (yang (using OR usindg))) pong yue ;".
• Adding a wildcard symbol may retrieve word variants: ((dong cao) or (dong sin)) yaa how best ((yang ping) or (yang (using OR usindg))) pong yue ;*.