The phrase "a specific and substantial" is correct and usable in written English.
It can be used when describing something that is both clearly defined and significant in size or importance.
Example: "The study provided a specific and substantial contribution to our understanding of climate change."
Alternatives: "a clear and significant" or "a definite and considerable".
Supervised training, however, requires specific and substantial resources and may be difficult to apply in a clinical context.
Specific and substantial agreements are needed to improve the supply of trade finance.
Pinter's language is very specific and substantial; his excavation of vocabulary is extraordinarily rich, and his echoing of the rhythms of speech (particularly non-posh speech) is very exact.
TOKYO — South Korea welcomed President Trump's announcement that he will meet North Korean leader Kim Jong Un in Vietnam on Feb. 27, expressing hope Wednesday that the pair can build off their first meeting to make "more specific and substantial progress" this time.
Environmental water management can achieve substantial ecological outcomes and address ongoing river degradation caused by past management and climate change; however it also causes specific and substantial burdens and benefits to different groups of stakeholders.
Nonetheless, specific and substantial physical, sexual, emotional and mental health problems often lead to a poor quality of life.
If you want exclusive rights to a particular DNA sequence, you now must define a "specific, substantial, and credible" use for it.
The Committee on Missions believes the term "FAO Mission" should be used only when a team of several experts is sent to a country or region to perform a specific service of substantial magnitude, and that the term "technical service" should be used for less substantial undertakings.
Pauly et al. presented a general model demonstrating that when there is a team production and substantial team-specific human capital, the value of lost output to the firm from an absence will exceed the daily wage of the absent worker and could be as large as the total output of the team [9].
