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
cua trong » cua truong, cua trung, qua trong
cong lang » cong luong, cong quang, cong ngang
cong vang » cong quang, cong ngang, cong san
toan cau » toan cao, toan ban, toan tap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh tranh cua trong ((cong lang) OR (cong vang)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh cua trong ((cong lang) OR (cong vang)) toan cau*.