Perhaps you should try some spelling variations:
trang quang » tran quang, trong quang, tang quang
hanh trang » thanh trung, canh tranh, hanh trinh
quang dung » quang trung, ung dung, cuong dung
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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 trang quang dung ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - hanh trang quang dung ((cong dan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - hanh trang quang dung ((cong dan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - hanh trang quang dung ((cong dan) OR (cong san)) toan cau*.