Kusai mono ni futa o suru (臭い物に蓋をする): to put a lid on what stinks. The magazine DIME explains the proverb as covering the source of a bad smell, instead of removing it, so that the smell does not escape. It means hiding what is inconvenient, so that it does not come to light.
Taishō ryōhō (対症療法): symptomatic treatment. In medicine, it treats the symptoms, not the cause of a disease. The Daijisen dictionary gives a second sense: handling a matter by responding to what appears on the surface, apart from a fundamental solution.