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
trong van » trong cac
qua dung » quang dung, qua song, qua cong
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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 ((qua dung) or (su dung)) trong van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tranh ((qua dung) OR (su dung)) trong van than cap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh ((qua dung) or (su dung)) trong van than cap*.