Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - hanh ((mang cua) OR (dung cua)) cong cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh ((mang cua) OR (dung cua)) cong cong tac toan cau*.