Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nang nguoi » tang nguoi, nhung nguoi, thang nguoi
tranh cac » trinh cac, thanh cac, tranh cai
nguoi dan » nguoi dao, nguoi san, nguong dan
cac nang » cam nang, cao nang, cac dang
dan toan » van toan, dan than, manh toan
toan cau » 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: doi ((chiet tach) or (chieu sach)) - canh tranh cac nang nguoi dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (chieu sach)) - canh tranh cac nang nguoi dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (chieu sach)) - canh tranh cac nang nguoi dan toan cau*.