Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
hanh nhanh » hanh nhan, nhanh thanh, thanh thanh
quang dung » quang trung, ung dung, cuong dung
dung cong » dung trong
thanh ban » thanh van, thanh bac, thanh bai
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chiet tach)) - hanh nhanh quang dung cong san ((thanh ban) OR (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chiet tach)) - hanh nhanh quang dung cong san ((thanh ban) OR (thanh san)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chiet tach)) - hanh nhanh quang dung cong san ((thanh ban) OR (thanh san))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chiet tach)) - hanh nhanh quang dung cong san ((thanh ban) OR (thanh san))*.