Perhaps you should try some spelling variations:
chinh luan » chinh ngan, trinh luan, binh luan
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
hieu lang » chieu sang, hieu quang, nhieu tang
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quan) or (hieu lang)) - hanh chinh luan nhung cong ((dan than) OR (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (hieu lang)) - hanh chinh luan nhung cong ((dan than) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quan) or (hieu lang)) - hanh chinh luan nhung cong ((dan than) OR (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (hieu lang)) - hanh chinh luan nhung cong ((dan than) OR (dan chan)) cau*.