Perhaps you should try some spelling variations:
scale mines » scale miners, scale mining
test scale » test score, cost scale, debt scale
dong yang » dong hoang, wang yang, yang yang
long shu » cong shu, tong shui
wong sau » wong sam, wong siu, wong shiu
long du » long d, long do, long run
ka hua » ya hua, ka chuan
chuan » chan

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang ((ka hua) or (say chuan)) test scale mines ((((long shu) OR (long du))) or (wong sau)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ((ka hua) OR (say chuan)) test scale mines ((((long shu) OR (long du))) OR (wong sau)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang ((ka hua) or (say chuan)) test scale mines ((((long shu) OR (long du))) or (wong sau)) ;*".