Even I use all the anti dandruff shampoo it's...

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Regarding your question
I recommend visiting a dermatologist to do the clinical exam

The following are factors that may contribute to dandruff:

1) Not enough hair brushing
2) Yeast
3) Dry skin.
4) Seborrheic dermatitis (irritated, oily skin).
5) Not enough shampooing

treatment of Dandruff

Pyrithione zinc shampoos , These contain the antibacterial and antifungal agent zinc pyrithione. This type of shampoo can reduce the fungus on your scalp that can cause dandruff and seborrheic dermatitis.
Tar-based shampoos, Coal tar, a byproduct of the coal manufacturing process, helps conditions such as dandruff, seborrheic dermatitis and psoriasis. It slows how quickly skin cells on your scalp die and flake off. If you have light-colored hair, this type of shampoo may cause discoloration.
Ketoconazole shampoos. Ketoconazole is a broad-spectrum antifungal agent that may work when other shampoos fail.
if these shampoos failed to mange your case , then you can use a steroid creams to get rid of the dandruff
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