Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
cong cong » cong dong, dung cong, dang cong
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
anh ban » anh bang, anh bai, anh van
ban cua » ban 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 ((thieu xanh) or (thien anh)) - anh ban cua ((cong cong) or (trong cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - anh ban cua ((cong cong) OR (trong cong)) tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - anh ban cua ((cong cong) or (trong cong)) tan toan cau*.