Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thien anh » thien danh, tien anh, thien thanh
trang cua » tranh cua, tang cua, trung cua
tang luan » dung luan
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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)) - hanh ((trang cua) or (tang luan)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - hanh ((trang cua) OR (tang luan)) dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - hanh ((trang cua) or (tang luan)) dung cong tan toan cau*.