Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
lanh manh » lanh tranh, van manh, anh anh
tong cong » trong cong, cong cong, dung cong
cua tinh » cua sinh, va tinh, ha tinh
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
lan anh » van anh, tuan anh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (cua tinh)) - ((lanh manh) OR (lan anh)) cua tong cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (cua tinh)) - ((lanh manh) OR (lan anh)) cua tong cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (cua tinh)) - ((lanh manh) OR (lan anh)) cua tong cong san toan ban*.