Perhaps you should try some spelling variations:
trong hoang » thong hoang, trong hoan, trong cong
lang trong » dung trong, cong trong, dong trong
phan cong » thanh cong
cong lang » cong vang, cong luong, cong quang
hoang van » hang va
doc hieu » hoc thieu, hoc hien
van chat » cao chat
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 cong lang trong hoang van van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) tinh - phan cong lang trong hoang van van chat.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) tinh - phan cong lang trong hoang van van chat*.