It is possible for you to enter Hong Kong, passport with at least 6 months validity is required when you apply for Hong Kong visa, however, Filipinos don't need a visa to Hong Kong for up to 14 days, therefore, if your passport still has 1 month validity beyond your stay in Hong Kong, you can use your passport to enter Hong Kong because your passport still has more than 2 months valiidty after you leave Hk.