Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
trinh han » trinh quan
han thong » han thuong, hang thong, nhan thong
ban toan » ban than, van toan, bao toan
bai toan » bai 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 chieu xanh - hanh trinh han thong thong ((ban toan) or (bai toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh trinh han thong thong ((ban toan) OR (bai toan)) ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh trinh han thong thong ((ban toan) or (bai toan)) ban*.