Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
theo phap » thi phap
phap tinh » phap sinh, phap tieng, phap tang
nhan dang » nhan dan, phan dang, tran dang
nhan lang » nhanh lang, nhon lang, nhung lang
dung cong » dung trong
van toan » van tuan, van tan, van thanh
toan cau » 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: theo phap tinh - ((nhan dang) or (nhan lang)) cua ((nhung cong) or (dung cong)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo phap tinh - ((nhan dang) OR (nhan lang)) cua ((nhung cong) OR (dung cong)) van toan cau.
• Adding a wildcard symbol may retrieve word variants: theo phap tinh - ((nhan dang) or (nhan lang)) cua ((nhung cong) or (dung cong)) van toan cau*.