Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
bang cong » dang cong, bang song, hang cong
van bang » van ban, van nang, von bang
cong hoa » dong hoa, dong hoc, hang hoa
hoa phan » hoa dan, co phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((hanh trinh) or (canh tranh)) van bang cong hoa phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh trinh) OR (canh tranh)) van bang cong hoa phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh trinh) or (canh tranh)) van bang cong hoa phan cau*.