Perhaps you should try some spelling variations:
trung thanh » truong thanh
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
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 - hanh ((trung tam) or (trung thanh)) bang cong van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trung tam) OR (trung thanh)) bang cong van tuan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trung tam) or (trung thanh)) bang cong van tuan ban*.