Perhaps you should try some spelling variations:
dung huong » dung thuong, dung phuong, dong huong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
chinh ta » chinh tai, chinh va, chinh tri
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
ta dung » tac dung, tan dung, tao dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (chieu xanh)) - hanh chinh ta dung huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - hanh chinh ta dung huong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu xanh)) - hanh chinh ta dung huong dan toan cau*.