Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
ho chieu » theo chieu, hoc thieu, doi chieu
qua dung » quang dung, su dung, qua song
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((thanh trung) OR (thanh tung)) qua dung ((cong tap) OR (cong tac)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((thanh trung) OR (thanh tung)) qua dung ((cong tap) or (cong tac)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((thanh trung) OR (thanh tung)) qua dung ((cong tap) or (cong tac)) toan cau*.