bỉ thử 
this and that, here and there, then and now, you and I, both (something), mutually [ bỉ ] : (1) low, vulgar, scornful, contemptuous, lowly, vulgar, humble; (2) Belgium, Belgian; (3) that
[ thử ] : to try, test, attempt
Most Common Compounds Set 1:
Most Common Compounds Set 2 :