Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
cau sach » cao sach, hau sach, rau sach
trung va » truong va, trang va, trung ha
tran van » luan van
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
sua cau » cua cau, lua cau, su cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: sua cau sach - thanh ((trung va) or (tran van)) nhung huong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: sua cau sach - thanh ((trung va) OR (tran van)) nhung huong dan than cau.
• Adding a wildcard symbol may retrieve word variants: sua cau sach - thanh ((trung va) or (tran van)) nhung huong dan than cau*.