Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chuc danh » chuc nganh, thuc hanh, chuc nang
chua nang » chuc nang, chua xang, kha nang
hoang van » hang va
cong vang » cong lang, cong quang, cong ngang
lang van » dang van, tang van, giang van
vang tan » van tan, tang tan, vang tao
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)) - nhanh ((lang van) OR (hoang van)) thong cong vang tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc danh) OR (chua nang)) - nhanh ((lang van) OR (hoang van)) thong cong vang tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc danh) or (chua nang)) - nhanh ((lang van) OR (hoang van)) thong cong vang tan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc danh) or (chua nang)) - nhanh ((lang van) OR (hoang van)) thong cong vang tan tap*.