Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cac phuong » cac truong
hoac khong » hoa khong, hoc khong, hay khong
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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 tang ((cac phuong) or (hoac khong)) cong ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh tang ((cac phuong) OR (hoac khong)) cong ban than cau*.