Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chieu sach » chinh sach, chiet tach, chieu sang
chua xang » chua nang, chuc nang, chu bang
manh toan » thanh toan, anh tuan, tinh toan
hanh han » hanh nhan, hanh phan, hanh san
dan toan » van toan, dan than, xuan toan
han va » hang va, hanh va, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chua xang) or (chieu sach)) - hanh han va nhung phuong ((dan toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chua xang) OR (chieu sach)) - hanh han va nhung phuong ((dan toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chua xang) or (chieu sach)) - hanh han va nhung phuong ((dan toan) OR (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chua xang) or (chieu sach)) - hanh han va nhung phuong ((dan toan) OR (manh toan)) cau*.