Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh dung » thanh dung, anh dung, manh dung
hanh dong » anh dong, ha dong
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong van » cong vang, cong san, song van
ban cao » bao cao, ban can, ban co

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - ((hanh dung) OR (hanh dong)) luan dang cong van ban cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - ((hanh dung) OR (hanh dong)) luan dang cong van ban cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - ((hanh dung) OR (hanh dong)) luan dang cong van ban cao*.