Perhaps you should try some spelling variations:
mines cong » minh cong
salt mines » scale mines, small mines
test salt » test sat, test split, test set
wang yang » wang yan, wang liang, wang yanling
dong bin » dong sin, dong di, dann bin
cong du » long du, cong shu, cong sun
12 a » 2 a, 1 a, 12 _
a a » a la

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong bin) or (wang yang)) ((12 a) or (a a)) test salt mines cong du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong bin) OR (wang yang)) ((12 a) OR (a a)) test salt mines cong du ;.
• Adding a wildcard symbol may retrieve word variants: ((dong bin) or (wang yang)) ((12 a) or (a a)) test salt mines cong du ;*.