Perhaps you should try some spelling variations:
hien thanh » thien thanh, hien hanh, tien thanh
nhanh lang » nhanh quang, nhanh thang, nhan dang
lang cua » mang cua, hang cua, long cua
cua dang » cua cong, cua ban
cong van » cong vang, song van, cong tan
cong san » cong tac
tan ban » toan ban, tang ban, van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien thanh - nhanh lang cua dang ((cong van) or (cong san)) tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien thanh - nhanh lang cua dang ((cong van) OR (cong san)) tan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien thanh - nhanh lang cua dang ((cong van) or (cong san)) tan ban*.