Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
dung cong » dung trong
chinh cu » chinh cau, chinh cua, chinh su
cham van » pham van, cham va, chao van
cu dung » su dung, duc dung
cong co » dong co, cong cu, cong so
co cham » ca cham, co champa, cao chat

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

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