Chonburi needed two injury-time goals from Yoo Byung-Soo and Panthamitr Praphan to rally past Samut Prakan City 2-1 in an entertaining Thai League 1 battle on Sunday night.
The home team had done well to defend the one goal Aris Zarifovic had given them in the 67th minute before Yoo and Panthamitr struck.
In another game last night, first-timers Nongbua Pitchaya overtook former champions Muang Thong United into sixth place with a 3-1 win over bottom-placed Chiangmai United.
The upshot lifted Nongbua, promoted to the top league at the start of the season, to 40 points, just one adrift of Chiang Rai United.
Hamilton Soares was at his best, grabbing a double in the first half to put Nongbua on course. Jiraphan Phasukkhan scored the third for Nongbua five minutes into the second half after being set up by Mahmoud Dahadha.
Saharat Kanyaroj grabbed a consolation goal for Chiangmai with a free-kick in added time.
The defeat left Chiangmai needing a miracle to avoid relegation.
On Saturday night, Australian coach Aurelio Vidmar claimed his first win that ended a long winless streak for Bangkok United.
Vidmar, who took charge of the capital side on March 11, made up for the Thai League Cup quarter-final exit last week with a thumping 3-0 Thai League 1 victory over former champions Chiang Rai United.
Everton Goncalves put Bangkok United ahead in the 21st minute before Chananan Pombuppha picked up two quick goals late in the second half to seal three points for the home team.
Also on Saturday night, PT Prachuap claimed three points at home following a 1-0 victory over 10-man Ratchaburi.
The winning goal came in the 42nd minute from Peerawat Akkrathum. Ratchaburi were reduced to 10 men in the 67th minute when Ekkalarp Harnpanichkit picked up his second yellow card.