Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
chieu sang » chieu sach, chieu xanh, hieu lang
dung cong » dung trong
mang cua » dung cua, ban cua, cong cua
manh cua » doanh cua, ban cua
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (thieu khang)) - hanh ((mang cua) or (manh cua)) dung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (thieu khang)) - hanh ((mang cua) OR (manh cua)) dung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (thieu khang)) - hanh ((mang cua) or (manh cua)) dung cong van toan ban*.