Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
nang luan » tang luan, hang luan, bang luan
nang quan » ban quan, nang suat
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
ca cau » cua cau, cac cau, can cau

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 - anh ((nang luan) or (nang quan)) thong ((cong dan) or (cong tan)) ca cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - anh ((nang luan) OR (nang quan)) thong ((cong dan) OR (cong tan)) ca cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - anh ((nang luan) or (nang quan)) thong ((cong dan) or (cong tan)) ca cau*.