Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
mang vua » mang cua, hang va, bang va
cong san » cong tac
mang va » hang va, bang va, dang va
chan tu » phan tu, han tu, chai tu
chon tu » con tu, cho tu, choi 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 - cach ((mang va) or (mang vua)) nhung cong san ((chan tu) or (chon tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - cach ((mang va) OR (mang vua)) nhung cong san ((chan tu) OR (chon tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - cach ((mang va) or (mang vua)) nhung cong san ((chan tu) or (chon tu))*.