Perhaps you should try some spelling variations:
using change » using exchange, putting change, sensing change
thing change » things change, teaching change, getting change
time lost » time cost, time list, time last
time loss » time gross
roberto n » robert _, robert e, robert j
tan yang » dan yang, tan ying, tan yong
yang yi » yang di, yang xi, yang jui

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 yang yi ((time lost) OR (time loss)) ((thing change) OR (using change)) roberto n ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tan yang yi ((time lost) or (time loss)) ((thing change) OR (using change)) roberto n ;~".
• Adding a wildcard symbol may retrieve word variants: tan yang yi ((time lost) or (time loss)) ((thing change) OR (using change)) roberto n ;*.