How look for command to do specific task?

Dear,

How could we know which command to use to do a specific task such as:  "convert boolean value to {1,0}" . I know we could use evalhf() but if we search with keyword "convert true false to 0 1 " in the Maple help then we may not find the right command

Using the Online Help is a solution but I want to know an offline solution since I am not always with the Internet. Did anyone wrote a summary sheet with the content such as : (i.e a list of all commands with keywords for searching)

evalhf() :  convert boolean to 1,0 or binary

member(): find matching

.....

so that we could easily search for right command for a specific task?

Thanks!