Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
canh dinh » canh tinh, anh dinh, canh binh
bang cong » dang cong, bang song, hang cong
van bang » van ban, van nang, von bang
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: ho ((chieu sang) or (chieu sach)) - canh dinh van bang cong thanh ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - canh dinh van bang cong thanh ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - canh dinh van bang cong thanh ((toan tap) or (toan ban))*.