Perhaps you should try some spelling variations:
phuong doan » phuong loan, phuong hoang, phuong hoa
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
hanh han » hanh nhan, hanh phan, hanh san
toan cao » toan tap
toan ban » van ban
han va » hang va, hanh va, nhan va

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: doi chieu xanh - hanh han va thuong ((phuong doan) OR (huong dan)) ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh han va thuong ((phuong doan) OR (huong dan)) ((toan cao) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh han va thuong ((phuong doan) OR (huong dan)) ((toan cao) or (toan ban))*.