Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
van thang » van thanh, van khang, van hang
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
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: ho chieu sach - hanh trinh va ((nhung cong) or (dung cong)) ((dan than) or (van thang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh va ((nhung cong) OR (dung cong)) ((dan than) OR (van thang)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh va ((nhung cong) or (dung cong)) ((dan than) or (van thang)) cau*.