where can i apply for visit visa in hongkong for one month

You should apply from Chinese embassy in your country or the HK Immigration Department directly. The required documents are: filled application form (for HK visa), a 48X36mm recent photo, documents showing your purpose of visiting HK. If your application is processed by Chinese embassy, you will wait for four working days to collect it. If it is done by HK Immigration Department, you should wait for around one month. It costs 1600 pesos.