Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
thien anh » thien danh, tien anh, thien thanh
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
trung vu » trung va, truong va, trung ha
van toan » van tuan, van tan, van thanh
vu dung » vu duong, su dung, vu dang

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

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