"illustrate better" is correct and usable in written English.
You can use it when you want to encourage someone to explain something more clearly by providing a specific example or visual aid, or when you want to suggest a solution to a problem by providing an example. For example: "To help clarify your point, could you illustrate better with an example?".
Nothing could illustrate better the desire of the Afghan people to take their future into their own hands.
To illustrate better the algorithm some examples of FGs identified for few simple molecules are shown in Fig. 1.
The simulation results clearly illustrate better performance of the proposed robust H∞ LFC, compared with existing designs.
Both UVP and VCP were used in the validation to illustrate better charging efficiency and capacity retention, which showed a much improved cycle life.
Simulation results which illustrate better performance of the proposed AIC corrections when applied to polynomial regression in comparison to AIC, AICc and other criteria are presented.
Given that this argument rests on providing incentives, what is needed to critique it are cases that illustrate better ways, or equally good ways, of stimulating production without granting private property rights to authors and inventors.
Nothing illustrates better the political crosscurrents, special interests, and shortsighted economics now at play in Europe than the debate over the restructuring of Greece's sovereign debt.
And as the largest private employer in the country, it illustrates better than most the huge stakes of the deal for many Vietnamese.
After all, and as Justice Thomas illustrated better than anyone, the burning cross is powerful precisely because it is a "symbol" -- a hideous, blood-drenched symbol -- but it is not inherently dangerous.
Nothing illustrates better the profound symbolic truth of this noted work than its continuing ability, even in translation, to evoke responses in readers belonging to widely separated cultural traditions.
These were the world's number one and two ranked teams, but the gap between the pair is illustrated better by Australia now having lost 21 of the last 26 meetings.
