Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
quang vung » quang vuong, quang dung, quang hung
hien xanh » hien hanh, hien nhanh, hien khanh
vung dong » cong dong
dong tinh » dong kinh, dong tin, cong tinh
toan ban » van ban

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 (chieu xanh)) - hanh trinh quang vung dong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - hanh trinh quang vung dong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh trinh quang vung dong tinh toan ban*.