Perhaps you should try some spelling variations:
based changes » based change, lagged changes
regional tax » regional taxes, region's tax, regional tfp
changes mae » changes made, changes a, chang mae
tax based » tax base, tax bases, tax basis
dong di » dong sin
yu a » you a, eu a, u a
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: (((wan or lang) yan) or (dong di)) ((yu a) or (a a)) regional tax based changes mae ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((wan OR lang) yan) OR (dong di)) ((yu a) OR (a a)) regional tax based changes mae ;.
• Adding a wildcard symbol may retrieve word variants: (((wan or lang) yan) or (dong di)) ((yu a) or (a a)) regional tax based changes mae ;*.