Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
quang dung » quang trung, ung dung, cuong dung
hieu manh » hieu nganh, dieu hanh, hien hanh
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
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: doc ((hieu manh) OR (chieu xanh)) - hanh trinh quang dung cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu xanh)) - hanh trinh quang dung cong tan ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (chieu xanh)) - hanh trinh quang dung cong tan ((toan cao) or (toan ban))*".