Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh xuan » trinh quan, trinh luan, trinh luat
trinh xay » trinh ky
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap
con dan » cong dan, con ban, con day
co dan » co ban, ca dan, cao dang

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 - hanh ((trinh xay) or (trinh xuan)) thuong ((con dan) OR (co dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh xay) OR (trinh xuan)) thuong ((con dan) OR (co dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh xay) or (trinh xuan)) thuong ((con dan) OR (co dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh xay) or (trinh xuan)) thuong ((con dan) OR (co dan)) toan cau*.