Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh tung » thanh cong
thien anh » thien danh, tien anh, thien chanh
dung cong » dung trong
tung dai » trung dai, tuong dai, tung dan
dai dung » dai duong, dan dung, mai dung
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 ((thien anh) or (thien thanh)) - thanh tung dai dung cong ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien anh) OR (thien thanh)) - thanh tung dai dung cong ((dan than) OR (dan chan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien thanh)) - thanh tung dai dung cong ((dan than) or (dan chan)) cao*.