Perhaps you should try some spelling variations:
phan dung » phan ung, phan dang, chan dung
doc hieu » hoc thieu, hoc hien
dung dat » dung va, dung tai
dung van » duong van, dung va, dang van
van chat » cao chat
dat ung » dat dung, dat rung, dap ung
van van » van ban, tan van, san 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 hieu) or (toc thieu)) tinh - phan dung dat ung dung van van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - phan dung dat ung dung van van chat.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - phan dung dat ung dung van van chat*.