Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
thong dan » thong van, tuong dan, thong den
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan ban, toan tap, toan tai
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: ho chieu xanh - ((canh trinh) or (hanh trinh)) he thong thong dan ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((canh trinh) OR (hanh trinh)) he thong thong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((canh trinh) or (hanh trinh)) he thong thong dan ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((canh trinh) or (hanh trinh)) he thong thong dan ((toan cau) OR (toan cao))*.