Perhaps you should try some spelling variations:
tcong thanh » thong thanh, trong thanh, truong thanh
cong thanh » dong thanh, cong trinh, cong tan
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
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: theo hieu lang - ((cong thanh) or (tcong thanh)) cua nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((cong thanh) OR (tcong thanh)) cua nhung cong tac toan ban*.