Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh thanh » canh tranh, danh thanh, anh thanh
trong toan » truong toan, trong tan, trong hoan
ho chieu » theo chieu, hoc thieu, doi chieu
qua dung » quang dung, qua song, qua cong
phan cau » phan dau, phan cac, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - canh thanh ((qua dung) OR (su dung)) trong toan ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - canh thanh ((qua dung) OR (su dung)) trong toan ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - canh thanh ((qua dung) OR (su dung)) trong toan ((phan cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh thanh ((qua dung) OR (su dung)) trong toan ((phan cau) or (phan tu))*.