Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
truong va » truong dai, truong cao, truong dao
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, 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: hoc ((thieu sach) OR (chieu sach)) - thanh truong va ((nhung cong) or (thong cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - thanh truong va ((nhung cong) OR (thong cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - thanh truong va ((nhung cong) or (thong cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - thanh truong va ((nhung cong) or (thong cong)) dan than cau*.