Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh tung » manh hung, thanh tung
dang cong » dung cong
hang nong » thang long, han tong
dang toan » dang tran, dan toan, dung toan
tung cua » trung cua, tuong cua, dung cua
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 ((dieu hanh) or (chieu sach)) - manh tung cua ((dang cong) or (hang nong)) dang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu sach)) - manh tung cua ((dang cong) OR (hang nong)) dang toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu sach)) - manh tung cua ((dang cong) or (hang nong)) dang toan cao*.