Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
chung cong » nhung cong, chong cong, phung cong
hoc thieu » toc thieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
trinh han » trinh quan
han tap » han tai, toan tap, nhan tai

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 tran quang ((chung cong) or (dung cong)) trinh han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tran quang ((chung cong) OR (dung cong)) trinh han tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tran quang ((chung cong) or (dung cong)) trinh han tap*.