Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
dung cong » dung trong
manh toan » thanh toan, tinh toan

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 tranh cua ((nhung don) or (dung cong)) ((manh toan) or (anh tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tranh cua ((nhung don) OR (dung cong)) ((manh toan) OR (anh tuan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua ((nhung don) or (dung cong)) ((manh toan) or (anh tuan)) cao*.