I'm wondering what products to use for summer scalp care and how to use them.

I have become curious about scalp care products for the summer. During the summer, my hair thins, and I frequently get dandruff and dead skin cells, which worries me a lot. I have tried various shampoos, but I haven't found a good one yet. I am looking for a really good shampoo and conditioner for summer scalp care. Also, I am going on an overseas trip soon, so the shampoo I need to use there has become very important. Since I am traveling to Southeast Asia, I think it will have a significant impact on my hair and scalp care. I would appreciate it if you could introduce me to good products for summer scalp care, specifically shampoos that are portable and suitable for travel. I would like recommendations for both shampoo and conditioner. I would like you to introduce me to good products that are suitable for my summer scalp care needs. Ideally, I would like you to recommend summer scalp care products that are affordable, offer good value for money, and come in large sizes. I tend to use a lot of shampoo and a little conditioner, so I prefer to use large quantities. I would appreciate it if you could recommend a product with good value for money. I have uploaded a photo of the product I am currently using, but I haven't seen much effect from it, so I would like you to introduce me to a different product.