Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hiem ngan » kim ngan, viem gan
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
tinh cua » trinh cua, sinh cua, tinh chat
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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 ((hiem ngan) OR (chieu xanh)) - hanh tinh cua nhung ((cong tac) OR (huong dan)) toan cau~.
• Adding a wildcard symbol may retrieve word variants: ho ((hiem ngan) or (chieu xanh)) - hanh tinh cua nhung ((cong tac) or (huong dan)) toan cau*.