Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
nhung cong » thong cong, hang cong, nhung don
hoc khien » hoc hien, hoc nghien, hoc thieu
dung cong » dung trong
chinh va » chinh ta, chinh tai, hanh va
van tuan » van quan, van ban, anh tuan
tuan cu » tuan tu, quan cua, tuan thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien bang - hanh chinh va ((nhung cong) or (dung cong)) van tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien bang - hanh chinh va ((nhung cong) OR (dung cong)) van tuan cu.
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - hanh chinh va ((nhung cong) or (dung cong)) van tuan cu*.