'thus has been' is correct and usable in written English.
You can use it when you want to express that something has been confirmed or established. For example, "Thus has been the result of months of research."
There seems to be only one such other structure beside Boy's surface, and it thus has been named Girl's surface.
Technology innovation is critical for organizational and economic development and thus has been widely discussed.
Peroral choledochoscopy is technically demanding and thus has been limited primarily to centers of excellence.
The encountered chemotherapeutic resistant of tumour cells, thus, has been associated with the increase of total GST expression.
Protease‐resistant prion protein (PrP‐res) is only associated with TSEs and thus has been a target for therapeutic intervention.
The specter of rationing, thus, has been a ruse to prevent the loss of power over such decisions.
It thus has been speculated that visual exposure to a figure induces in the brain a condition of localized satiation.
The history of deposit insurance in the United States thus has been a process of increasing systemic risk in the name of reducing liquidity risk.
Aspirin is effective in reducing fever, inflammation, and swelling and thus has been used for treatment of rheumatoid arthritis, rheumatic fever, and mild infection.
He said his position during this year's campaign pertained to the general idea and not a specific piece of legislation and, thus, has been consistent.
His long-term importance thus has been as a legendary figure of the early stages of European exploration and discovery, as well as an exemplar of Portuguese nationalism.
