We don't have synonyms for help oneself yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are sell oneself.
(v) :
(reflexive) To serve oneself, especially to take food or other supplies, rather than wait to be served by another; used to indicate friendly permission or invitation.
(v) :
(reflexive) To take something freely; to serve oneself without restraint.
(v) :
(chiefly in the negative) To exhibit self-control.
(v) :
Used other than figuratively or idiomatically: see help.
(v) :
(reflexive) To serve oneself, especially to take food or other supplies, rather than wait to be served by another; used to indicate friendly permission or invitation.
(v) :
(reflexive) To take something freely; to serve oneself without restraint.
(v) :
(chiefly in the negative) To exhibit self-control.
(v) :
Used other than figuratively or idiomatically: see help.