Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu xanh » chieu sach, chieu sang, chieu tinh
trong cach » trong cac, trong canh, trong hach
trong mach » trong cac, trong minh, trong anh
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
nhanh van » thanh van, nhan van, nhanh va
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (hieu manh)) - hanh tranh cua dung ((trong cach) OR (trong mach)) nhanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu manh)) - hanh tranh cua dung ((trong cach) OR (trong mach)) nhanh van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (hieu manh)) - hanh tranh cua dung ((trong cach) OR (trong mach)) nhanh van".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu manh)) - hanh tranh cua dung ((trong cach) OR (trong mach)) nhanh van*.