Perhaps you should try some spelling variations:
ranh mach » trinh mach, tinh mach, ban mach
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
toan cau » toan cao, toan ban, toan tap
anh anh » thanh anh, hinh anh, minh 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: theo chu xanh - ((ranh mach) OR (anh anh)) cua ((hang cong) OR (hang nong)) tinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((ranh mach) or (anh anh)) cua ((hang cong) or (hang nong)) tinh toan cau*.