Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
cho hieu » cao hieu, co hieu, chi hieu
anh nang » ganh nang, anh bang, anh dang
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tai
toan cao » toan ban
toan tap » toan ban
nang va » nang van, hang va, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho hieu lang - anh nang va nhung cong tan ((((toan cau) or (toan cao))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho hieu lang - anh nang va nhung cong tan ((((toan cau) OR (toan cao))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: cho hieu lang - anh nang va nhung cong tan ((((toan cau) or (toan cao))) or (toan tap))*.