Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
hanh va » hang va, hanh vi

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