I have vim with UltiSnips and it's working but only if I write the whole trigger. Is there a way to expand the snippet writing only a part of the trigger? I used to work with SnipMate and that works.
e.g.: If I have a trigger like follows:
snippet someTrigger
blah blah
endsnippet
It expand the snippet when I type:
someTrigger<tab>
But it doesn't when I type
some<tab>
Ultisnips also offers an API usually mapped to <C-Tab>
UltiSnips#ListSnippets()
, you should use that in case you want to avoid typing the entire snippet name, although the chances of clashes will be more.