Perhaps you should try some spelling variations:
trong chuan » trong chan, trong thuan, trong chuong
thong chuan » thong chuon, thong chuyen, thong chuong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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 - anh ((trong chuan) OR (thong chuan)) trong cong tan ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - anh ((trong chuan) OR (thong chuan)) trong cong tan ((than cau) OR (than cap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - anh ((trong chuan) OR (thong chuan)) trong cong tan ((than cau) or (than cap))*".