"not very considerable" is correct and usable in written English
You can use it when referring to something that is not considered very important or worthy of being taken into account. For example, "The amount of money invested was not very considerable, so the project was deemed not viable."
And likely for the same motives: a realistic and grown-up acceptance of their own not very considerable thespian limits, and a taste for high-impact expressive minimalism in performance, the currency of pure movie stars, not of actors per se.
Huge consumer electronics companies like Motorola and Sony have thrown their gauntlets into the wrist-mounted display ring with devices that link up to their respective Android smartphones, with varying (and not very considerable) degrees of popularity.
The Americans claimed 20 killed and another 20 wounded, and Washington in a letter to Congress said the losses were "not very considerable"; however, the British reported burying 41 Americans, and Howe's official report claimed "not less than fifty killed and many more wounded".
Kocarli Adnan Menderes Urban Forest is not only a very considerable ecotourism area for people who live in Kocarli and near villages but also for people living in Aydın and other districts.
Because T1D is a heterogenous disease, and as the initial antigenic repertoire as primary target of the immune attack is still not very well defined, considerable efforts have been devoted to non-antigenic immune interventions.
The existence of present deficiencies should not detract from the very considerable progress in agricultural development that has already been achieved in several developing countries, including India.
Another factor limiting the growth of bridge has been that, like chess, it is not very telegenic and requires considerable prior experience before a television viewer can appreciate the play.
This is in particular the case in sparsely populated areas, where the grid is not very strong, but a considerable amount of renewable energy resources is available.
Moreover, the pH change of low salinity water was not very significant compared with the considerable ion exchange during spontaneous imbibition tests.
The built-up area itself is not very hilly but there are considerable differences in terrain.
This study has revealed that the magnitude of substance use among undergraduate medical students was considerable, although not very high, but lower than the findings of other studies that reported for adolescents and young adults.
