Perhaps you should try some spelling variations:
tranh quang » tran quang, trinh quang, tinh quang
hanh tranh » canh tranh, hanh trinh, hanh trang
quang hung » quang dung, quang phuong, quang trung
tieu sach » chieu sach, dien sach, te sach
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh tranh quang hung ((cong dan) OR (cong san)) phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh tranh quang hung ((cong dan) OR (cong san)) phan dau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh tranh quang hung ((cong dan) OR (cong san)) phan dau*.