Perhaps you should try some spelling variations:
phuong cong » phuong dong, phung cong, phuong hoang
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
canh trinh » canh tranh, hanh trinh, canh tinh
phong cong » phong chong, thong cong, chong cong
trinh va » trinh van, trinh vat, trinh ve
van toan » van tuan, van tan, van thanh
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 trinh va ((phuong cong) OR (phong cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (nhieu tang)) - canh trinh va ((phuong cong) OR (phong cong)) van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (nhieu tang)) - canh trinh va ((phuong cong) OR (phong cong)) van toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (nhieu tang)) - canh trinh va ((phuong cong) OR (phong cong)) van toan cau*.