Perhaps you should try some spelling variations:
thanh tung » thanh cong
dien anh » tieng anh
dien dan » hien dai, vien dai, gian dan
tung cua » trung cua, tuong cua, dung cua
ban cong » bang cong, van cong, phan cong
dan toan » van toan, dan than, manh toan
tap doan » tap quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dien anh) OR (dien dan)) - thanh tung cua ban cong ((dan toan) or (tap doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien anh) OR (dien dan)) - thanh tung cua ban cong ((dan toan) OR (tap doan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dien anh) OR (dien dan)) - thanh tung cua ban cong ((dan toan) or (tap doan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((dien anh) OR (dien dan)) - thanh tung cua ban cong ((dan toan) or (tap doan)) cau*.