Perhaps you should try some spelling variations:
dong truyen » cong truyen, tang truyen, dong chuyen
tranh trong » tran trong, trinh trong, anh trong
sinh tranh » sinh trinh, canh tranh, sinh trung
doanh tien » doanh tren, doanh vien, doanh chien
danh viet » anh viet, ninh viet, nang viet
bo sach » co sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hoc sinh tranh trong ) or ( bo sach ((((doanh tien) or (dong truyen))) or (danh viet)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hoc sinh tranh trong ) OR ( bo sach ((((doanh tien) OR (dong truyen))) OR (danh viet)) )).
• Adding a wildcard symbol may retrieve word variants: (( hoc sinh tranh trong ) or ( bo sach ((((doanh tien) or (dong truyen))) or (danh viet)) ))*.