Ratchanok Intanon and Phittayaporn Chaiwan progressed to the last 16 round of the US$1.2 million Indonesia Open in Jakarta on Wednesday.
Eighth seed Ratchanok defeated fellow Thai Pornpawee Chochuwong 21-17, 21-17 and will face either Lianne Tan of Germany or Line Hojmark Kjaersfeldt of Denmark for a place in the quarter-finals.
Earlier, Phittayaporn booked her berth in the last 16 after she defeated local star Gregboria Mariska Tunjung 21-17, 10-21, 21-12 in the BWF World Tour Super 1000 event.
She will take on sixth seed Nozomi Okuhara of Japan today.
Another Thai hope Supanida Katethong failed to progress after she retired trailing 6-13 in the first game against Zhang Yiman of China.
In the mixed doubles event, Supak Jomkoh and Supissara Paewsampran moved into the last 16.
They defeated Kim Won-Ho and Jeong Na-Eun of South Korea 21-17, 13-21, 21-15 and will play second seeds Zheng Siwei and Huang Yaqiong of China in the last 16.
Men's singles stars Kunlavut Vitidsarn and Kantaphon Wangcharoen both exited the tournament.
Kunlavut lost to fourth seed Chou Tien-chen of Taiwan 20-22, 21-19, 12-21 while Kantaphon bowed out to seventh seed Jonatan Christie of Indonesia 20-22, 8-21.
Meanwhile, Japanese sports equipment manufacturer Yonex has extended its support for the Badminton Association of Thailand (BAT).
Yonex president Alyssa Yoneyama and BAT chief Patama Leeswadtrakul signed a new sponsorship deal in Tokyo on Tuesday.
Khunying Patama said the deal will help bring further success to Thai badminton.