PPT stand for physical presence test and BFR, bona fide residence.

HK has the world's highest limit for housing exclusion, so the housing exclusion will be to be figured based on the amounts applicable to different parts of the year for HK vs Manila.

When I referred to tax home, I don't mean a physical home but a tax home as defined under §162.

To better understand the concepts and application of §911, you may find Pub 54 and the instructions for F.2555 helpful, for a start.