Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
chuc danh » chuc nganh, thuc hanh, chuc nang
chua nang » chuc nang, chua xang, kha nang
nhan dang » nhan dan, phan dang, tran dang
dang van » hoang van, hang va
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chuc danh) or (chua nang)) - nhan dang van ((nhung cong) OR (thong cong)) van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chua nang)) - nhan dang van ((nhung cong) OR (thong cong)) van tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc danh) or (chua nang)) - nhan dang van ((nhung cong) OR (thong cong)) van tan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chua nang)) - nhan dang van ((nhung cong) OR (thong cong)) van tan tap*.