Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
hoc thieu » toc thieu, hoc hien
thong cao » thong cac, thong cap, thong cau
nhung van » phung van, nhung bai, nhung cau
hang nong » thang long, han tong
doc hieu » toc thieu, hoc hien
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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) OR (hoc thieu)) sach - thanh thong cao ((nhung van) or (hang nong)) dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) sach - thanh thong cao ((nhung van) OR (hang nong)) dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc thieu)) sach - thanh thong cao ((nhung van) or (hang nong)) dan than cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc thieu)) sach - thanh thong cao ((nhung van) or (hang nong)) dan than cao*.