Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
nhung cong » dung cong, thong cong, hang cong
hoc khien » hoc hien, hoc nghien, hoc thieu
chinh cua » chinh ca, chinh sua, hinh cua
cong tuan » cong tan, cong luan, cong thanh
chinh ta » chinh tai, chinh va, chinh tri
tuan van » luan van, tran van, tan van

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 cua) or (((chinh cho) or (chinh ta)))) nhung cong tuan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien bang - hanh ((chinh cua) OR (((chinh cho) OR (chinh ta)))) nhung cong tuan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc khien bang - hanh ((chinh cua) or (((chinh cho) or (chinh ta)))) nhung cong tuan van ban*.