Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
nha thong » nhan thong, nhat thuong, nghe thong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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 - thanh trong nha thong ((cong dan) or (cong tan)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trong nha thong ((cong dan) OR (cong tan)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trong nha thong ((cong dan) or (cong tan)) ((toan cao) or (toan ban))*.