Given the equation \[ 4x^3 \plus{} 4x^2y \minus{} 15xy^2 \minus{} 18y^3 \minus{} 12x^2 \plus{} 6xy \plus{} 36y^2 \plus{} 5x \minus{} 10y \equal{} 0,\] find all positive integer solutions.
Given the equation:
\[ 4x^3 + 4x^2y - 15xy^2 - 18y^3 - 12x^2 + 6xy + 36y^2 + 5x - 10y = 0, \]
we need to find all positive integer solutions.

1. **Factor the equation:**
   We start by trying to factor the given polynomial. Notice that the polynomial can be grouped and factored as follows:
   \[
   4x^3 + 4x^2y - 15xy^2 - 18y^3 - 12x^2 + 6xy + 36y^2 + 5x - 10y
   \]
   Grouping terms:
   \[
   (4x^3 + 4x^2y - 12x^2) + (-15xy^2 + 6xy) + (-18y^3 + 36y^2) + (5x - 10y)
   \]
   Factor out common terms in each group:
   \[
   4x^2(x + y - 3) + 3xy(-5y + 2) + 18y^2(-y + 2) + 5(x - 2y)
   \]
   Notice that each group can be factored further:
   \[
   4x^2(x - 2y) + 12xy(x - 2y) + 9y^2(x - 2y) - 12x(x - 2y) - 18y(x - 2y) + 5(x - 2y)
   \]
   Factor out \((x - 2y)\):
   \[
   (x - 2y)(4x^2 + 12xy + 9y^2 - 12x - 18y + 5)
   \]
   Simplify the quadratic expression:
   \[
   4x^2 + 12xy + 9y^2 - 12x - 18y + 5 = (2x + 3y)^2 - 6(2x + 3y) + 5
   \]
   Therefore, the equation becomes:
   \[
   (x - 2y)((2x + 3y - 1)(2x + 3y - 5)) = 0
   \]

2. **Solve each factor:**
   We now solve for \(x\) and \(y\) from each factor:
   - \(x - 2y = 0\):
     \[
     x = 2y
     \]
     Since \(x\) and \(y\) are positive integers, let \(y = a\), then \(x = 2a\). Thus, the solution is:
     \[
     (x, y) = (2a, a) \quad \text{for any positive integer } a.
     \]

   - \(2x + 3y - 1 = 0\):
     \[
     2x = 1 - 3y \implies x = \frac{1 - 3y}{2}
     \]
     For \(x\) to be a positive integer, \(1 - 3y\) must be even and positive. However, since \(y\) is a positive integer, \(1 - 3y\) will be negative for all positive \(y\). Thus, there are no positive integer solutions for this factor.

   - \(2x + 3y - 5 = 0\):
     \[
     2x = 5 - 3y \implies x = \frac{5 - 3y}{2}
     \]
     For \(x\) to be a positive integer, \(5 - 3y\) must be even and positive. Let \(5 - 3y = 2k\) for some integer \(k\):
     \[
     3y = 5 - 2k \implies y = \frac{5 - 2k}{3}
     \]
     For \(y\) to be a positive integer, \(5 - 2k\) must be divisible by 3 and positive. Solving \(5 - 2k \equiv 0 \pmod{3}\):
     \[
     2k \equiv 2 \pmod{3} \implies k \equiv 1 \pmod{3}
     \]
     Let \(k = 3m + 1\) for some integer \(m\):
     \[
     y = \frac{5 - 2(3m + 1)}{3} = \frac{5 - 6m - 2}{3} = \frac{3 - 6m}{3} = 1 - 2m
     \]
     For \(y\) to be positive, \(1 - 2m > 0 \implies m = 0\). Thus, \(y = 1\) and:
     \[
     x = \frac{5 - 3(1)}{2} = 1
     \]
     Therefore, the solution is:
     \[
     (x, y) = (1, 1)
     \]

Conclusion:
The positive integer solutions are:
\[
(x, y) = (2a, a) \quad \text{for any positive integer } a \quad \text{and} \quad (1, 1).
\]

The final answer is \( \boxed{ (x, y) = (2a, a) \text{ for any positive integer } a \text{ and } (1, 1) } \).