Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
luan lang » luan nang, quan lang, lan lang
lang cong » dang cong, bang cong, hang cong
cong dan » cong san, cong tan, huong dan
nhan tao » nhan dan
nhan tai » hang tai, van tai, toan tai

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)) - canh tranh luan lang cong dan ((nhan tao) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - canh tranh luan lang cong dan ((nhan tao) OR (nhan tai)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - canh tranh luan lang cong dan ((nhan tao) or (nhan tai))*.