Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thuong cua » thong cua, truong cua, tuong cua
hieu lang » chieu sang, nhieu tang, hieu van
huong cua » dung cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) OR (hieu quang)) - thanh ((thuong cua) or (huong cua)) trong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (hieu quang)) - thanh ((thuong cua) OR (huong cua)) trong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) OR (hieu quang)) - thanh ((thuong cua) or (huong cua)) trong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) OR (hieu quang)) - thanh ((thuong cua) or (huong cua)) trong cong san toan ban*.