Perhaps you should try some spelling variations:
change timor » change time, change theory, change timing
can change » urban change
yang yang » wang yang, wang yan
yan yuan » yan guan, fang yuan, nan yan
wang hui » wang hua, wang zhi, wang wei
yan yan » nan yan, wang yan, qian yan
hua can » hua ban, arua can, hua chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang or lang) ((((yan yan) OR (yan yuan))) or (yang yang)) hua can change timor wang hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR lang) ((((yan yan) OR (yan yuan))) OR (yang yang)) hua can change timor wang hui ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) ((((yan yan) OR (yan yuan))) or (yang yang)) hua can change timor wang hui ;".
• Adding a wildcard symbol may retrieve word variants: (wang or lang) ((((yan yan) OR (yan yuan))) or (yang yang)) hua can change timor wang hui ;*.