Perhaps you should try some spelling variations:
regional tax » regional taxes, region's tax, regional tfp
tang shang » tang tang, tang zheng, tang shiping
shang hai » shang kai, dang hai, chang ha
tax tang » tang tang, tax tax, tax take
ya a » a a, y a, ye a
wang » wing, wan
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((wang or lang) yan) or (((dong di) or (dong sin)))) ya a regional tax tang shang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((wang OR lang) yan) OR (((dong di) OR (dong sin)))) ya a regional tax tang shang hai ;.
• Adding a wildcard symbol may retrieve word variants: (((wang or lang) yan) or (((dong di) or (dong sin)))) ya a regional tax tang shang hai ;*.