Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trang » thanh trung, hanh trinh, minh trang
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
ban thanh » ban hanh, ban hang
thanh tap » thanh lap, thanh tai, thanh tay
cong ban » cong bang, cong san, cong tan

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