Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
anh bang » anh hoang, anh quang, tinh bang
va duong » van duong, va tuong, va huong
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
bang va » hang va, ban va, trang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - anh bang va duong cong tan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - anh bang va duong cong tan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - anh bang va duong cong tan ((toan tai) or (toan cao))*.