Perhaps you should try some spelling variations:
nhung thuong » nhung huong, nhung tuong, hang thuong
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
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)) - canh tranh cua ((nhung thuong) OR (nhung phuong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - canh tranh cua ((nhung thuong) OR (nhung phuong)) tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung thuong) OR (nhung phuong)) tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung thuong) OR (nhung phuong)) tinh toan cau*.