隨便睇睇英文點講

have a look, OR
come and have a look

樓主的原句係隨隨便便，點解要求答案要四四正正的商業英語。難明！

正如樓主說啲答案都答對了，但又滿意，試吓給你一個建議：

Welcome, please take your time to browse around our store.
Welcome, please browse around and find something you like.

希望你會是個比較正統商業句子。

take a look..
come and see see..