Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, cua tinh, cac tinh
cua nhung » va nhung
hanh han » hanh nhan, hanh phan, hanh san
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
ha tinh » va tinh, may tinh
han cua » hang cua, nhan cua, than cua

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: hoc ((chau tinh) OR (ha tinh)) - hanh han cua nhung cong san ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chau tinh) OR (ha tinh)) - hanh han cua nhung cong san ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chau tinh) OR (ha tinh)) - hanh han cua nhung cong san ((toan cau) or (toan cao))*.