Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
luong tai » dung tai, luong va
cong tap » cuong tap, cong tac, cong tan
doan cau » toan cau, doan cap, doanh chau
doan dau » doan dieu, phan dau, doan va

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