Perhaps you should try some spelling variations:
while preparing » while preserving, china preparing, guide preparing
while breaking » while reading, china breaking, wave breaking
yanling liang » yang liang
free ding » free riding, free using, free dna
liang li » ling li, qiang li, liang wei
und » fund

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wan or wing) yanling liang li ((while breaking) OR (while preparing)) free ding und ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wan OR wing) yanling liang li ((while breaking) OR (while preparing)) free ding und ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wan or wing) yanling liang li ((while breaking) OR (while preparing)) free ding und ;".
• Adding a wildcard symbol may retrieve word variants: (wan or wing) yanling liang li ((while breaking) OR (while preparing)) free ding und ;*.