Perhaps you should try some spelling variations:
thang trong » thong trong, than trong, khoang trong
dung thang » hung thang, cung thang, dung thuong
trong dang » truong dang, trong dan, trong dong
hanh dung » thanh dung, anh dung, hanh dong
doc hieu » hoc thieu, hoc hien
dang van » hoang van, hang va
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 - hanh dung thang trong dang van van chat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) tinh - hanh dung thang trong dang van van chat".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) tinh - hanh dung thang trong dang van van chat*.