Perhaps you should try some spelling variations:
thong quang » thong quan, thong qua, luong quang
thieu sang » chieu sang, thieu khang, thieu quang
hang thong » hang thuong, hang khong, mang thong
quang tuan » quang thanh, quan luan, quang cua
hoc thieu » toc thieu, hoc hien
thang va » hang va, thong va, thanh va
trang va » tran van, hang va
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - cang ((thang va) or (trang va)) hang thong quang tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - cang ((thang va) OR (trang va)) hang thong quang tuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - cang ((thang va) or (trang va)) hang thong quang tuan ban*.