Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
va phuong » va thuong, cac phuong
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
tranh va » tranh van, trang va, trinh va
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: theo ((chieu xanh) or (nhieu tang)) - canh tranh va phuong cong vang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (nhieu tang)) - canh tranh va phuong cong vang toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (nhieu tang)) - canh tranh va phuong cong vang toan cau*.