Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
hung cong » hung cuong, phung cong, dung cong
chu manh » ho manh, chu han, chu van
anh tang » anh bang, anh dang, anh nang
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
chuc » thuc, chua, phuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu manh) or (chuc nang)) - anh tang luan ((hung cong) OR (nhung cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu manh) OR (chuc nang)) - anh tang luan ((hung cong) OR (nhung cong)) van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu manh) or (chuc nang)) - anh tang luan ((hung cong) OR (nhung cong)) van toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu manh) or (chuc nang)) - anh tang luan ((hung cong) OR (nhung cong)) van toan cao*.