Perhaps you should try some spelling variations:
phong kham » phong nam
duoc dien » duoc lieu
kham dung » kham xung, kha dung, khao dung
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
doc diep » ngoc diep, dac diem, doc hieu
danh van » doanh van, dang van, dinh van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc diep) or (duoc dien)) tinh - khanh phong kham dung cong danh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc diep) OR (duoc dien)) tinh - khanh phong kham dung cong danh van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc diep) or (duoc dien)) tinh - khanh phong kham dung cong danh van ban*.