Perhaps you should try some spelling variations:
phuong hanh » phuong thanh, phuong anh, phuong danh
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thu phuong » thi phuong, thu huong, theo phuong
nhan dang » nhan dan, phan dang, tran dang
dang cua » dung cua, dong cua, mang cua
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
cua thu » cua chu, ca thu, cua tu

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) OR (chieu sach)) - nhan dang cua thu phuong hanh ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - nhan dang cua thu phuong hanh ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - nhan dang cua thu phuong hanh ((toan cau) OR (toan cao))*.