Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh nhanh » hanh nhan, nhanh thanh, thanh thanh
quang dung » quang trung, ung dung, cuong dung
cong thanh » dong thanh, cong trinh, cong tan
lieu tinh » trieu tinh, diep tinh, bien tinh
thanh ban » thanh san, thanh van, thanh bac
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 ((lieu tinh) or (chiet tach)) - hanh nhanh quang dung ((cong thanh) or (cong san)) thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((lieu tinh) OR (chiet tach)) - hanh nhanh quang dung ((cong thanh) OR (cong san)) thanh ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((lieu tinh) or (chiet tach)) - hanh nhanh quang dung ((cong thanh) or (cong san)) thanh ban*.