Perhaps you should try some spelling variations:
credit lasting » credit rating, credit granting, credit ratings
lasting career » lasting careers, playing career, learning careers
mapping based » mapping land, mapping buyer, mapping phase
mapping shu » mapping snn, mapping safe, mapping slam
de credit » du credit, 2 credit, trade credit
qian yan » qian yi

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((qian yan) OR (qian jun)) de credit lasting career ((mapping shu) or (mapping based)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((qian yan) OR (qian jun)) de credit lasting career ((mapping shu) OR (mapping based)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((qian yan) OR (qian jun)) de credit lasting career ((mapping shu) or (mapping based)) ;".
• Adding a wildcard symbol may retrieve word variants: dong ((qian yan) OR (qian jun)) de credit lasting career ((mapping shu) or (mapping based)) ;*.