Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua thang » cua hang, cua thanh, xua thang
long dan » long doan, cong dan, nong dan
toan cau » toan cao, toan ban, toan tap

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