The Ranma 1/2 FAQ at
http://www.wot-club.org.uk/RanmaFAQ/ hasn't been updated in a decade, but the information there is still valid and quite useful. They have a rather comprehensive list of techniques on the
Special Moves page.
For instance, if you wanted to know what the beer-throwing attack Ranma used against the Orochi is called, the entry in the FAQ is as follows:
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Shuku Shögan Tsü Hömatsu Dan V26.7.105
victory celebration painful eyes foam bombs
Ranma takes a crate of beer, shakes it, throws all the bottles up into the air, uses his hand to cut off all the tops, then sends the foaming bottles into the eyes of the orochi, paining it.
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Do note that the volume.chapter.page indexes refer to the Japanese tankoubans, not the English Viz books.