sharpen (someone's) focus

Translations
усилить (чье-то) внимание
The coach's advice helped sharpen her focus during the competition.
Советы тренера помогли ей усилить внимание во время соревнований.
Definitions
To enhance or clarify someone's concentration or attention on a specific task or goal, often by providing guidance or eliminating distractions.
Words
focus

noun
сосредоточенность
sharpen

verb
точить