Perhaps you should try some spelling variations:
thanh chuong » thanh huong, thanh cong, nhanh chong
chieu sang » chieu sach, chieu xanh, hieu lang
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu sang - ((khanh phong) or (thanh chuong)) va thuong ((cong thanh) OR (dong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((khanh phong) OR (thanh chuong)) va thuong ((cong thanh) OR (dong thanh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((khanh phong) or (thanh chuong)) va thuong ((cong thanh) OR (dong thanh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((khanh phong) or (thanh chuong)) va thuong ((cong thanh) OR (dong thanh)) toan cau*.