Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
chiet tach » chieu sach
cong thong » cong thuong, cong trong, dong thong
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
thong van » trong van, thong va, thong quan
tinh cua » trinh cua, sinh cua, tinh chat
van toan » van tuan, van tan, van thanh
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 (chiet tach)) - hanh tinh cua cong thong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chiet tach)) - hanh tinh cua cong thong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chiet tach)) - hanh tinh cua cong thong van toan cau*.