Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
tran xuan » tran van
cong tan » cong tac, cong san, cong thanh
ban dau » bat dau, ban dan, van dau
van cau » van dau, van hau, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh ((tran xuan) OR (tran quang)) truong cong tan ((ban dau) or (van cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh ((tran xuan) OR (tran quang)) truong cong tan ((ban dau) OR (van cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh ((tran xuan) OR (tran quang)) truong cong tan ((ban dau) or (van cau))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh ((tran xuan) OR (tran quang)) truong cong tan ((ban dau) or (van cau))*.