Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan thong » quang thong, quan trong, xuan thong
doi chieu » doc hieu, doi chi, ho chieu
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 quan thong thong ((ban toan) OR (bai toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh trinh quan thong thong ((ban toan) OR (bai toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh trinh quan thong thong ((ban toan) OR (bai toan)) ban*.