The phrase "a very strong influence" is correct and usable in written English.
You can use it when describing the significant impact or effect that something or someone has on a person, situation, or outcome.
Example: "The mentor had a very strong influence on her career choices, guiding her towards success."
Alternatives: "a powerful impact" or "a significant effect".
"He loved what he did, which was a very strong influence.
"Previously, the sectarian violence had a very strong influence on people, and they were influenced by that," he said.
On the east side, we also have a very strong influence from tropical climate modes like El Nino".
Unquestionably as ideas they exerted a very strong influence on the development of equestrian statues in the 16th century.
When I first started working my father was a very strong influence on me: my business philosophy and my work ethic were both shaped by him.
"I think it'd be safe to say that Darren was a very strong influence on the early development and direction of my game.
He was a very strong influence in my life and was a great believer in female empowerment – he was so ahead of his time.
15% (35/232) and 23% (53/230) respondents who stated that meta-analyses and systematic reviews respectively have a strong or very strong influence on their therapeutic decision making, had no or only a rough understanding of the meaning of these types of articles.
She further said, "I can only say that the children told us that the priests had in one case flogged a child for coming to our school, and had used very strong influence to prevent them from coming, and that I have myself been absolutely insulted in the street by Catholic children ... who feel erroneously that they were showing their zeal for their own religion by insulting Protestants".
Using a 5-point Likert scale ranging from "not at all" to "very strong influence" (see Table 2: Appendix) we asked students to rate the degree to which each of these was considered important as a reason for their specialty choice.
A later study using the data of antenna to antenna volumes of communications in Ivory Coast confirmed the very strong influence of language on the formation of communities in a large country.
