Perhaps you should try some spelling variations:
studying changes » studying change, study changes, studying cancer
studying chaos » studying chain, studying china's, studying change
stand 2001 » stand 2000, stand 2002, stand 2009
band 0.1 » band 10.2, band 13.1, band 1

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((studying chaos) OR (studying changes)) - ((band 0.1) OR (stand 2001)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((studying chaos) OR (studying changes)) - ((band 0.1) or (stand 2001))".
• Adding a wildcard symbol may retrieve word variants: ((studying chaos) OR (studying changes)) - ((band 0.1) or (stand 2001))*.