Perhaps you should try some spelling variations:
thang thong » thong thong, hang thong, thang trong
hieu nganh » vien nganh, hiem ngan, hieu manh
quan lang » quan hoang, gian lang, quan luan
muong van » luong van, muong va, truong van
duong van » duong va, luong va, dang van
doc hieu » toc thieu, hoc thieu, hoc hien
toan cao » toan ban, toan tap

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 nganh - thang thong quan lang ((muong van) or (duong van)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - thang thong quan lang ((muong van) OR (duong van)) toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thang thong quan lang ((muong van) or (duong van)) toan cao*.