Perhaps you should try some spelling variations:
truong phuong » truong chung, truong trung, dung phuong
nhung phuong » dung phuong, nhu phuong, bang phuong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
he hieu » he nhieu, he dieu, de hieu

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

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