Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 nganh) or (chieu sach)) - hanh trinh cua dung cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu nganh) OR (chieu sach)) - hanh trinh cua dung cong ((dan toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu nganh) or (chieu sach)) - hanh trinh cua dung cong ((dan toan) or (dan than)) cau*.