Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
luong cong » dung cong, trong cong, cong cong
dua luong » da luong, du luong, duc luong
anh nang » ganh nang, anh bang, anh dang
nang dua » nang du, nang suat, nang quan
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat

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) OR (chiet tach)) - anh nang dua luong cong tac phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - anh nang dua luong cong tac phan tu".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - anh nang dua luong cong tac phan tu*.