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, van 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 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 tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - lanh tranh cua phuong cong ((ban toan) or (van tuan)) cao*.