Trong Ngo focused on enhancing time-based transaction search precision in the mezonai/mmn-tx-explorer repository by replacing block_timestamp filtering with transaction_timestamp filtering. Using Go and leveraging skills in API development, backend development, and data indexing, he implemented this change as a targeted, single-commit update to ensure minimal risk and clear traceability. This adjustment improved the accuracy of time-bound queries and strengthened the reliability of downstream analytics and reporting. The work demonstrated careful attention to data correctness and maintainability, resulting in a clean, auditable code change that aligns search semantics with the actual transaction timestamp for more precise results.