Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu sach » chieu sach, hieu cach, hieu cac
dien sach » dien anh
hanh doan » hanh doanh, thanh toan, thinh doan
hinh toan » tinh toan, thanh toan, trinh toan
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (dien sach)) - ((hanh doan) or (hinh toan)) va nhung cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (dien sach)) - ((hanh doan) OR (hinh toan)) va nhung cong dan phan dau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (dien sach)) - ((hanh doan) or (hinh toan)) va nhung cong dan phan dau*.