Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
chieu sach » chinh sach, chiet tach, chieu sang
hieu sach » hieu cach, dien sach, hieu cac
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
luong va » dung va
toan tap » toan ban
va toan » van toan, bai toan, tap toan

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 (chieu sach)) - ((hanh tang) OR (hanh mang)) cua nhung luong va toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (chieu sach)) - ((hanh tang) OR (hanh mang)) cua nhung luong va toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sach) or (chieu sach)) - ((hanh tang) OR (hanh mang)) cua nhung luong va toan tap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (chieu sach)) - ((hanh tang) OR (hanh mang)) cua nhung luong va toan tap*.