Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
ngang toan » nganh toan, dang toan
quang toan » quang tuan, quang tran, quang doan
hanh hang » thanh hang, hang hang, hanh han
va thong » va thuong, va phuong, he thong

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)) - hanh hang va thong cong ((ngang toan) OR (quang toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sach)) - hanh hang va thong cong ((ngang toan) OR (quang toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sach)) - hanh hang va thong cong ((ngang toan) OR (quang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sach)) - hanh hang va thong cong ((ngang toan) OR (quang toan)) cau*.