to investigate strictly
... 信用卡检查码 card validation code 严查 to investigate strictly 尤塔兰查邦 uttaranchal ...
probe
close inspection ; rigid inspection ; close check ; meticulous inspection
tightened inspection
yán zhā ㄧㄢˊ ㄓㄚ 严查(严查) 严格检查。《清会典事例·刑部·刑律捕亡应捕人追捕罪人》:“若本官不行严查责究……则捕役玩纵之风更无忌惮。”