Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
cua thong » cua thuong, cua khong, cua tong
chu xanh » chu manh, chieu xanh, chua xang
hang cua » mang cua, hang ca, huong cua
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (chieu sach)) - hanh hang cua thong cong ((dan toan) OR (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chieu sach)) - hanh hang cua thong cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chieu sach)) - hanh hang cua thong cong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu sach)) - hanh hang cua thong cong ((dan toan) OR (dan than)) cao*.