Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
tranh ban » trinh ban, tranh hang, tranh luan
tran van » luan van
cong tac » cong ty
chan tu » han tu, chon tu, chai tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - canh ((tranh ban) or (tran van)) nhung cong tac ((chan tu) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - canh ((tranh ban) OR (tran van)) nhung cong tac ((chan tu) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh ((tranh ban) or (tran van)) nhung cong tac ((chan tu) or (phan tu))*.