Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chang cong » hang cong, chong cong, thanh cong
thang phan » thanh phan, thong phan, than phan
hanh hang » thanh hang, hang hang, hanh han
tan thang » toan thang, tran thang, van thang
co chang » ca chang, co chung, chi chang
cong tan » cong tac, cong san, cong thanh
hieu ca » hieu cac, hieu cua, hieu va
hang co » hang cho, hang ca, nang co

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 hang co chang cong tan thang phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu ca) OR (chieu sach)) - hanh hang co chang cong tan thang phan*.