Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu sach » chinh sach, chiet tach, chieu sang
khong cong » thong cong, khong cang, chong cong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chieu sach)) - hanh trung cua khong cong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sach)) - hanh trung cua khong cong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sach)) - hanh trung cua khong cong ((dan toan) or (manh toan)) cao*.