Ratchaburi secured another three points after they hammered Eastern FC 7-0 in Group F of the AFC Champions League Two at the Mong Kok Stadium on Wednesday night.
All the goals came in the second half as the Thai League 1 side completed a double over the Hong Kong club to revive their hopes for a place in the knockout stage.
The Dragons are level with second-placed Nam Dinh on six points after the Vietnamese side lost 1-0 at home to leaders Gamba Osaka of Japan, who claimed their fourth successive win.
Ratchaburi, who defeated Eastern 5-1 two weeks ago, got their goals from Scott Allardice (52nd), Tana (56th, 72nd), Denilson (65th, 83rd) and Ikhsan Fandi (89th, 90th+5).
Sustained pressure from Ratchaburi paid off when Allardice scored from just outside the box after being teed up by Negueba.
Tana doubled the visitors’ advantage with a powerful drive four minutes later and the Dragons extended their lead in the 65th minute when Njiva set up Denilson to slot home.
Tana got his second of the night seven minutes later, while Denilson scored again in the 83rd minute. Fandi then netted twice in the dying minutes to complete an emphatic win.