Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
thanh phan » thanh pho, thanh san, thanh toan
hanh phan » anh phan, hanh han, hanh nhan
tan thanh » tran thanh, tang thanh, toan thanh
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
hieu ca » hieu cac, hieu cua, hieu va
phan va » phan van, nhan va, han va

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 ca) OR (chieu sach)) - hanh phan va thong cong tan thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu ca) OR (chieu sach)) - hanh phan va thong cong tan thanh phan*".