Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong tac » cong ty
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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 ((mang cua) or (dung cua)) hang cong tac ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((mang cua) OR (dung cua)) hang cong tac ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((mang cua) or (dung cua)) hang cong tac ((toan tai) or (toan cao))*.