Perhaps you should try some spelling variations:
change roberto » chang roberto, change robert, echandi roberto
anion change » anion exchange, union changes, anion channels
wang liang » wang yang
new anion » new union, new action, new nation
roberto b » robert b, roberto n, roberto f
tan kong » tan hong
a times » _ times, bad times, a timely

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tan kong) or (wang liang)) ((a times) OR (a time)) new anion change roberto b ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tan kong) OR (wang liang)) ((a times) OR (a time)) new anion change roberto b ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tan kong) or (wang liang)) ((a times) OR (a time)) new anion change roberto b ;*".