Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
cong cong » cong dong, trong cong, dung cong
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
manh cua » doanh cua, ban cua
than cau » toan cau, phan cau, than cap

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) or (hien hanh)) - hanh manh cua cong cong bang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh manh cua cong cong bang than cau*.