Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc hieu » hoc thieu, doc hieu, hoc dieu
chinh ta » chinh tai, chinh va, chinh tri
ta nhung » tay nhung, va nhung, tu nhung
cong van » cong vang, cong san, song van
van chat » cao chat
chat cao » chat co, chat cho, chat bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc hien)) lang - hanh chinh ta nhung cong van chat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) lang - hanh chinh ta nhung cong van chat cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) lang - hanh chinh ta nhung cong van chat cao*.