Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chinh quan » chinh luan, chinh quyen, chinh ngan
hieu lang » chieu sang, nhieu tang, hieu van
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
toan tap » toan ban

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 lang) or (hieu quang)) - hanh chinh quan ((hang cong) OR (dang cong)) manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - hanh chinh quan ((hang cong) OR (dang cong)) manh toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu quang)) - hanh chinh quan ((hang cong) OR (dang cong)) manh toan tap*".