Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tranh cua » manh cua
doanh cua » doanh luan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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) OR (doanh cua)) nhung ((cong dan) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh ((tranh cua) OR (doanh cua)) nhung ((cong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - canh ((tranh cua) OR (doanh cua)) nhung ((cong dan) or (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh ((tranh cua) OR (doanh cua)) nhung ((cong dan) or (cong tan)) phan cau*.