Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
manh tung » manh hung, thanh tung
nong cong » cong cong, tong cong, nang cong
tung cua » trung cua, tuong cua, dung cua
cua nong » cua cong, cuu nong, cua dong
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((trieu tinh) or (chieu xanh)) - manh tung cua nong cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((trieu tinh) OR (chieu xanh)) - manh tung cua nong cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((trieu tinh) or (chieu xanh)) - manh tung cua nong cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((trieu tinh) or (chieu xanh)) - manh tung cua nong cong san ((toan cau) OR (toan cao))*.