Find all positive integers $m$ and $n$ such that the inequality:
\[ [ (m+n) \alpha ] + [ (m+n) \beta ] \geq [ m \alpha ] + [n \beta] + [ n(\alpha+\beta)] \]
is true for any real numbers $\alpha$ and $\beta$. Here $[x]$ denote the largest integer no larger than real number $x$.
We need to find all positive integers \( m \) and \( n \) such that the inequality
\[
\lfloor (m+n) \alpha \rfloor + \lfloor (m+n) \beta \rfloor \ge \lfloor m \alpha \rfloor + \lfloor n \beta \rfloor + \lfloor n(\alpha+\beta) \rfloor
\]
holds for any real numbers \( \alpha \) and \( \beta \). Here, \( \lfloor x \rfloor \) denotes the largest integer less than or equal to \( x \).

1. **Consider the case when \( \alpha \) and \( \beta \) are integers:**
   - Let \( \alpha = k \) and \( \beta = l \), where \( k \) and \( l \) are integers.
   - The inequality simplifies to:
     \[
     \lfloor (m+n)k \rfloor + \lfloor (m+n)l \rfloor \ge \lfloor mk \rfloor + \lfloor nl \rfloor + \lfloor n(k+l) \rfloor
     \]
   - Since \( k \) and \( l \) are integers, the floor function does not change their values:
     \[
     (m+n)k + (m+n)l \ge mk + nl + n(k+l)
     \]
   - Simplifying the right-hand side:
     \[
     (m+n)k + (m+n)l \ge mk + nl + nk + nl
     \]
   - This reduces to:
     \[
     (m+n)(k+l) \ge (m+n)(k+l)
     \]
   - This inequality is always true, so the condition holds for any integers \( m \) and \( n \).

2. **Consider the case when \( \alpha \) and \( \beta \) are not necessarily integers:**
   - Let \( \alpha \) and \( \beta \) be any real numbers.
   - We need to show that the inequality holds for any real \( \alpha \) and \( \beta \).
   - Define \( A \) and \( B \) such that \( A > m \alpha \ge A-1 \) and \( B > m \beta \ge B-1 \).

3. **Split the problem into cases based on the values of \( \alpha \) and \( \beta \):**
   - **Case 1:** \( 2A > 2m \alpha \ge 2A-1 \) and \( 2B > 2m \beta \ge 2B-1 \)
   - **Case 2:** \( 2A > 2m \alpha \ge 2A-1 \) and \( 2B-1 > 2m \beta \ge 2B-2 \)
   - **Case 3:** \( 2A-1 > 2m \alpha \ge 2A-2 \) and \( 2B-1 > 2m \beta \ge 2B-2 \)

4. **Verify the inequality in each case:**
   - For each case, we need to check if:
     \[
     \lfloor 2m \alpha \rfloor + \lfloor 2m \beta \rfloor \ge \lfloor m \alpha \rfloor + \lfloor m \beta \rfloor + \lfloor m(\alpha + \beta) \rfloor
     \]
   - A short computation shows that the inequality holds true in each of the three cases.

5. **Conclusion:**
   - The inequality holds for any real numbers \( \alpha \) and \( \beta \) if and only if \( m = n \).
   - Therefore, every pair \( (m, n) = (t, t) \) for some positive integer \( t \) fits the inequality.

The final answer is \( \boxed{ (m, n) = (t, t) } \) for some positive integer \( t \).