Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » hieu quang, nhieu tang, hieu van
cua nhung » va nhung
hanh san » thanh san, khach san, thanh son
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
san cua » sang cua, ban cua, dan cua

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

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