Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
manh trung » manh tung, thanh trung, manh hung
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
hoc hieu » hoc thieu, hoc hien, doc hieu
toan cao » toan ban, toan tap

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 lang - ((manh trung) or (canh tranh)) cua nhung cong hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((manh trung) OR (canh tranh)) cua nhung cong hach toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((manh trung) or (canh tranh)) cua nhung cong hach toan cao*.