Thank you for your reply.
Actually, I also got problem in searching for bond in IB.
Below is what I hv asked IB for reference :
My Q to IB :
In Bond Scanner : I only set :
Instrument = Corporate Bonds
Includes bonds without quotes = V
Exclude Defaulted
the below bond does not shown :
MBI Corp Bond 6.4 Aug15'22 IBCID29367633
IB's reply : "There should not be any restrictions on trading this MBI 6.4% 08/15/22 bond (ISIN US55262CAH34) at IB. To pull this bond up in the TWS to place an order, simply type the ISIN into an empty line in the TWS. I cannot explain why something does or does not show up in the Bond scanner."