GOVSRCH using COM API

I'm still not following. Would you mind elaborating on what you're looking to achieve? Are you trying to get all RICs for a given bond? Then you shouldn't use RSearch. RSearch serves the use case when you're looking for a list of instruments based on a criteria (e.g. all bonds issued by companies domiciled in a given country and with maturity dates between X and Y). RSearch returns one identifier per instrument. If you're looking to get all RICs for a given bond use DEX2 library with the field TR.RICS. Or in Excel use

=TR("SG095378323=","TR.RICS")

You're not going to get these RICs from RSearch. RSearch returns only the primary RIC for an instrument, and for bonds typically the primary RICs are composite, not exchange RICs. E.g. the primary RIC for 4403.HK is KY202243436=. If you're looking to get RICs for bonds listed on HKEx, you can get them from chains 0#BONDA.HK, 0#BONDH.HK and 0#BONDP.HK. If you're looking for something else, then you need a better, less ambiguous definition for what you're looking for than "all RICs for Australia and Hong Kong for all Asset Types". A country is not an attribute of a RIC. Many financial instruments cannot be attributed to a single country. Even for stocks "all RICs for Australia" could mean all stocks listed on ASX or all stocks of public companies headquartered in Australia, which is not the same thing. For bonds there's even more ambiguity: country of issuer domicile, country of issuer incorporation, exchange country for listed bonds, borrower country when borrower is different from the issuer etc.

You can retrieve chains using AdxRtChain class of AdfinX Real-Time COM library.