Perhaps you should try some spelling variations:
anion exchange » cation exchange, ion exchange, asian exchange
wang liang » wang yang
new anion » new union, new action, new nation
tan yong » tan hong, tan kong, tan yang
robert b » robert _, robert e, robert a
robert j » robert _, robert e
3 times » _ times, 3 time, a times

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: ((tan yong) OR (wang liang)) 3 times new anion exchange ((robert b) OR (robert j)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tan yong) or (wang liang)) 3 times new anion exchange ((robert b) OR (robert j)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((tan yong) or (wang liang)) 3 times new anion exchange ((robert b) OR (robert j)) ;*.