Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
tranh cua » doanh cua, manh cua
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

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 ((tang luan) or (tranh cua)) dang cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((tang luan) OR (tranh cua)) dang cong tan tran tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((tang luan) or (tranh cua)) dang cong tan tran tap*.