Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
hanh ban » thanh ban, hang ban, hanh san
cong san » cong tac
toan cau » toan ban, toan tai
toan cao » toan ban
toan tap » toan ban
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh ban cua nhung cong san ((toan cau) or (((toan cao) OR (toan tap))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh ban cua nhung cong san ((toan cau) OR (((toan cao) OR (toan tap))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - hanh ban cua nhung cong san ((toan cau) or (((toan cao) OR (toan tap))))*".