Perhaps you should try some spelling variations:
phuong trinh » cong trinh, huong tran, phuong anh
chuong trinh » cong trinh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
tinh cua » trinh cua, sinh cua, tinh chat
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - hanh tinh cua nhung ((phuong trinh) OR (chuong trinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - hanh tinh cua nhung ((phuong trinh) OR (chuong trinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - hanh tinh cua nhung ((phuong trinh) OR (chuong trinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - hanh tinh cua nhung ((phuong trinh) OR (chuong trinh)) toan cau*.