cuộc đấu tranh bền bỉ 
an enduring struggle [ cuộc ] : [CL for meetings, gatherings); office, action
[ đấu ] : to struggle, fight, compete
[ tranh ] : (1) picture, painting; (2) to compete, contend, dispute
[ bền ] : durable, long-lasting, firm, solid, strong, solid
[ bỉ ] : (1) low, vulgar, scornful, contemptuous, lowly, vulgar, humble; (2) Belgium, Belgian; (3) that
Most Common Compounds Set 1:
Most Common Compounds Set 2 :