Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
lanh tranh » canh tranh, lan tranh, hanh trinh
cua phuong » cuu phuong, cuc phuong, luan phuong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
ban toan » bai toan, ban than, bao toan
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 xanh - lanh tranh cua phuong cong ((ban toan) or (((van toan) OR (van tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - lanh tranh cua phuong cong ((ban toan) OR (((van toan) OR (van tuan)))) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - lanh tranh cua phuong cong ((ban toan) or (((van toan) OR (van tuan)))) cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - lanh tranh cua phuong cong ((ban toan) or (((van toan) OR (van tuan)))) cao*.