Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
san chang » ban hang, dan chan, van khang
chang cac » hang cac, chung cach, hang ca
bi trong » ro trong, le trong, ly trong
cong san » cong tac
cong bi » uong bi, cong li, cong ti

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 (hieu lang)) - thanh cong bi trong cong san chang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh cong bi trong cong san chang cac.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh cong bi trong cong san chang cac*.