Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hanh dang » hanh dong, anh dang, hanh dung
van thong » van thuong, van phong, va thong
tan thanh » tran thanh, tang thanh, toan thanh
thanh cha » thanh ha, thanh nha, thanh phan
dang van » hoang van, hang va
cong tan » cong tac, cong san, cong thanh
hieu va » lieu va, hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu va) OR (chieu sach)) - hanh dang van thong cong tan thanh cha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu va) OR (chieu sach)) - hanh dang van thong cong tan thanh cha*".