Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
hoac khong » hoa khong, hoc khong, hay khong
trong minh » truong minh, trong kinh, thong minh
hua khong » hoa khong, cua khong, phuc khong
minh toan » tinh toan, manh toan, minh tuan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) or (chieu sach)) - hanh trung ((hua khong) OR (hoac khong)) trong minh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - hanh trung ((hua khong) OR (hoac khong)) trong minh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - hanh trung ((hua khong) OR (hoac khong)) trong minh toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - hanh trung ((hua khong) OR (hoac khong)) trong minh toan ban*.