Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, mot chieu
cong gian » chong gian, con gian, cong giao
gian dan » gian lang
dan dong » van dong, dan dung, dao dong
dong tai » dung tai, luong tai, cong tac
tai toan » bai toan, tap toan, tai tuan
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: doi chieu xanh - thanh cong gian dan dong tai toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh cong gian dan dong tai toan cau*.