The phrase 'enhance the theme' is correct and can be used in written English. You can use it to talk about improving or adding to a theme. For example, "Our decorations will enhance the theme of a romantic night out."
The film clips are a motif used to enhance the theme of the desire to find meaning or detect patterns.
A sense of guilt on the Pevensies' part was added, seeing the destruction of Narnia in their absence, as was hubris for Peter to enhance the theme of belief: his arrogance means he is unable to see Aslan.
To enhance the theme of a beach wedding reception, use sand castles as table centerpieces.
The accents you choose should enhance the theme of the wedding.
The book An Imperial Affliction, which features within both the original novel and the film, is fictitious, as is its author Peter van Houten; both are used to enhance the themes and story.
Though Jarman has altered some of Marlowe's lines to enhance the gay theme, that one is original.
It is one of those rare Shakespearean productions in which technique, language and character all echo and enhance the same theme.
To enhance the dental theme of the song, Yankovic called in his actual dentist, who brought a real drill and a human tooth, which the two took turns drilling while recording to create a genuine sound effect.
Use yellow flowers such as roses to enhance the golden theme.
(To enhance the glam-rock theme of the party at Carnaval, she hired two dwarfs to dress as Paul Stanley and Gene Simmons of the band Kiss).
Something simple and timeless, but a design that enhances the overall theme.
