Perhaps you should try some spelling variations:
thanh tung » thanh cong
tong cong » trong cong, cong cong, dung cong
vien anh » vien canh, viet anh, tien anh
dien anh » tieng anh, dien dan
tung cua » trung cua, tuong cua, dung cua
cua tong » cua cong, cua dong, cua nong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

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