Perhaps you should try some spelling variations:
khac thuong » hoc thuong, phan thuong, pham thuong
thanh trung » thanh tung
thuong cong » thong cong, thuong con, thuong dong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung khac » truong khac, trung khanh, trung hoc
cong thanh » dong thanh, cong trinh, cong tan
khoa than » hoa thai, hoa tan, kho khan
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (chieu sach)) - thanh trung khac thuong cong thanh ((khoa than) OR (khoa luan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - thanh trung khac thuong cong thanh ((khoa than) OR (khoa luan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - thanh trung khac thuong cong thanh ((khoa than) OR (khoa luan))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - thanh trung khac thuong cong thanh ((khoa than) OR (khoa luan))*.