Perhaps you should try some spelling variations:
trien quang » tran quang, tuyen quang, dien quang
nhanh lang » nhanh quang, nhanh thang, nhan dang
thong cong » trong cong, tong cong, thong thong
hieu quan » hieu qua, lieu quan, thien quan
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
lang va » lang van, hang va, lang ha
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quan) or (trien quang)) - nhanh lang va thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (trien quang)) - nhanh lang va thong cong dan van ban*.