Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
chinh han » chinh phan, chin han, chinh ban
han nhung » hanh nhung, hon nhung, ban nhung
cong van » cong vang, cong san, song van
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - hanh chinh han nhung cong van ((tuan cau) OR (tuan cu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - hanh chinh han nhung cong van ((tuan cau) or (tuan cu))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - hanh chinh han nhung cong van ((tuan cau) or (tuan cu))*.