Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cua thuong » cua phuong, ca thuong, cua huong
cua truong » cua trung, xuan truong, cac truong
duong tinh » duong minh, duong sinh, dong tinh
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) or (cao hieu)) xanh - hanh tranh ((cua thuong) OR (cua truong)) duong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (cao hieu)) xanh - hanh tranh ((cua thuong) OR (cua truong)) duong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (cao hieu)) xanh - hanh tranh ((cua thuong) OR (cua truong)) duong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (cao hieu)) xanh - hanh tranh ((cua thuong) OR (cua truong)) duong tinh toan cau*.