Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh hang » thanh hoang, thanh thang, tranh hang
thong cong » trong cong, tong cong, thong thong
hanh hang » hang hang, hanh han, hanh mang
cua thong » cua thuong, cua khong, cua tong
chu xanh » chu manh, chieu xanh, chua xang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 ((chu xanh) or (chieu sach)) - ((hanh hang) OR (thanh hang)) cua thong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chieu sach)) - ((hanh hang) OR (thanh hang)) cua thong cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chieu sach)) - ((hanh hang) OR (thanh hang)) cua thong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu sach)) - ((hanh hang) OR (thanh hang)) cua thong cong dan toan cao*.