A spare tree could be constructed by striking keys C-c / r or C-c / / (org-occur)
Upon traversing the next match:
M-g n or M-g M-n (next-error)
Jump to the next sparse tree match in this buffer.
M-g p or M-g M-p (previous-error)
Jump to the previous sparse tree match in this buffer.
It does not work correctly but reported error
No more Flycheck error.
flycheck is turned off.
