Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
quan trong » gian trong
hanh nang » ganh nang, hanh mang, hanh trang
ho chieu » theo chieu, hoc thieu, doi chieu
anh nang » ganh nang, anh bang, anh dang
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

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