Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, hanh trinh, minh trang
cua nhung » va nhung
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
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 sach - ((hanh trang) or (canh tranh)) cua nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh trang) OR (canh tranh)) cua nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh trang) or (canh tranh)) cua nhung cong dan toan cao*.