Here I will post some papers that I authored / coauthored that may be useful.
UC Irvine Real Analysis Qual
Description: Solutions to UC Irvine Real analysis quals. Use this at your own risk.
Link download: UCI Real Qual.
Description: Some techniques of using Bernoulli's inequality to solve non-homogeneous inequalities that occurred in some math competitions.
Link download: Bernoulli's inequality.
Tuyển tập các bài toán hình học phẳng
Description: A collection of typical geometry problems that occurred in math competitions.
Link download: Tuyển tập các bài toán hình học phẳng.