Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
toan thanh » tran thanh, hoan thanh, toan thang
cong toan » cong tan, cong hoan, cong tuan
thanh cha » thanh ha, thanh nha, thanh phan
hanh han » hanh nhan, hanh phan, hanh san
hieu ca » hieu cac, hieu cua, hieu va
han va » hang va, hanh va, nhan 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 han va nhung cong toan thanh cha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu ca) OR (chieu sach)) - hanh han va nhung cong toan thanh cha*.