Perhaps you should try some spelling variations:
hoang duong » hoang vuong, hoang dung, hoang tuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » hanh chinh
cua hoang » cua hang, quan hoang, tuan hoang
duong can » duong van, duong san, duong cac
can van » cac van, can ban, tan van

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