Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
hien xanh » hien hanh, hien nhanh, chieu xanh
cua nhung » va nhung
doan van » doan va, hoang van, luan van
dao van » do van, dang van

You may be able to get more results by adjusting your search query.

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