Perhaps you should try some spelling variations:
cua phuong » cuu phuong, cuc phuong, luan phuong
cua khong » hua khong, cua thuong, cua cong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
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: ((hoc hien) or (ho chieu)) xanh - canh tranh ((cua khong) OR (cua phuong)) cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (ho chieu)) xanh - canh tranh ((cua khong) OR (cua phuong)) cong vang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hien) or (ho chieu)) xanh - canh tranh ((cua khong) OR (cua phuong)) cong vang toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (ho chieu)) xanh - canh tranh ((cua khong) OR (cua phuong)) cong vang toan cau*.