The term 'เพียงแค่ (phiang kâe)' is often used in Thai to highlight a small amount, a simple or single action, or minimal effort. This phrase can be used in several contexts, and it's commonly placed at the beginning of a sentence or phrase. The concept is similar to the English expressions 'merely', 'just', or 'only', emphasizing the simplicity or singularity of a certain action or amount.