Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chung cong » nhung cong, chong cong, phung cong
thang phan » thanh phan, thong phan, than phan
hanh phan » thanh phan, anh phan, hanh han
dac thang » duc thang, bac thang, dai thang
ca chung » cac chung, cua chung, cao chung
cong dac » cong tac, cong dan, cong cac
hieu ca » hieu cac, hieu cua, hieu va
phan ca » phan cac, phan cau, phan cam

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