Full-text search in electronic versions of the Kanjur (advanced search)
Here you can search for a quotation and get results which contain your (more or less) accurate quote. For instance if you type "rgyal po kyi mchod", you could find རྒྱལ་པོ་ཉིད་མཆོད etc.
You can scale the accuracy of the search by moving the latch between "exact match" to "less accurate".
The more "less accurate" you select, the more results you will get which could match with your search.
This search engine needs some time to compile the results. Be patient!