Perhaps you should try some spelling variations:
thanh tung » thanh cong
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
tung khao » thong khao, tuong khai, tung ho
khao dung » kha dung, thao duong, khao huong
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
van than » van thanh, van thang, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien anh)) - thanh tung khao dung cong ((manh toan) or (van than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh tung khao dung cong ((manh toan) OR (van than)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - thanh tung khao dung cong ((manh toan) or (van than)) cao*.