Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trong hach » trong mach, trong cach, trong hanh
va phuong » va thuong, cac phuong
hach toan » thanh toan, manh toan
anh tang » anh bang, anh dang, anh nang
va thong » va thuong, he thong, va cong
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: theo ((chieu xanh) or (chieu sach)) - anh tang ((va thong) OR (va phuong)) trong hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - anh tang ((va thong) OR (va phuong)) trong hach toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sach)) - anh tang ((va thong) OR (va phuong)) trong hach toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - anh tang ((va thong) OR (va phuong)) trong hach toan cau*.