Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
trinh han » trinh quan
cong danh » cuong danh, cong dan, cong thanh
danh phan » doanh phan, danh nhan, danh phap
phan dau » phan tu, hang dau
va cong » tai cong, cua cong
han va » hang va, hanh va, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu sang)) - hanh trinh han va cong danh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh trinh han va cong danh phan dau*.