Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
luong tai » dung tai, luong va
thong va » trong va, thong cua, truong va
tai doan » thai doan, tap doan, thi doan
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (hieu lang)) - thanh thong va nhung luong tai doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (hieu lang)) - thanh thong va nhung luong tai doan tap.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (hieu lang)) - thanh thong va nhung luong tai doan tap*.