Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
lenh hanh » lenh thanh, lenh canh, linh thanh
duong van » duong va, luong va, dang van
song van » hoang van, trong van, dang van
phan cau » phan dau, phan cac, phan tu
hanh va » hang va, hanh vi

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)) - lenh hanh va thuong ((song van) or (duong van)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - lenh hanh va thuong ((song van) OR (duong van)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - lenh hanh va thuong ((song van) or (duong van)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - lenh hanh va thuong ((song van) or (duong van)) phan cau*.