Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh vat » trinh van, trinh luat, sinh vat
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh ve, trinh vi
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: ho chieu xanh - hanh ((trinh va) OR (trinh vat)) nhung ((cong dan) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh va) OR (trinh vat)) nhung ((cong dan) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh va) OR (trinh vat)) nhung ((cong dan) or (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh va) OR (trinh vat)) nhung ((cong dan) or (cong tan)) toan cau*.