Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tuan cau » toan cau, quan cau, tuan cu

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