Perhaps you should try some spelling variations:
nphung cong » nhung cong, nhung cang, nhung chong
chieu sach » chinh sach, chiet tach, chieu sang
phung cong » nhung cong, phong cong, nhung chong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tai » cong thai, cong tac, dong tai
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh cong tai ((phung cong) or (nphung cong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh cong tai ((phung cong) OR (nphung cong)) dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong tai ((phung cong) or (nphung cong)) dan phan tu*.