Perhaps you should try some spelling variations:
thong quang » thong quan, thong qua, luong quang
cang thang » cong thanh, dang thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
quang tuan » quang thanh, quan luan, quang cua
hieu lang » hieu quang, nhieu tang, hieu van
van hang » van khang, van hoang, van thang
tuan ban » tuan bang, toan ban, luan ban
va hang » va nang, va lang, va hanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (hieu lang)) - cang thang ((va hang) or (van hang)) thong quang tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - cang thang ((va hang) OR (van hang)) thong quang tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (hieu lang)) - cang thang ((va hang) or (van hang)) thong quang tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (hieu lang)) - cang thang ((va hang) or (van hang)) thong quang tuan ban*.