Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
phan thanh » pham thanh, ban thanh, van thanh
thanh thao » thanh thanh, thanh thang, thanh pho
va truong » van truong, xa truong, va thuong
cong phan » cong nhan, cong khan, chong phap
va trong » va thong, va tuong, va trung

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) OR (thien hach)) - thanh tung ((va trong) or (va truong)) cong phan thanh thao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (thien hach)) - thanh tung ((va trong) OR (va truong)) cong phan thanh thao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) OR (thien hach)) - thanh tung ((va trong) or (va truong)) cong phan thanh thao".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) OR (thien hach)) - thanh tung ((va trong) or (va truong)) cong phan thanh thao*.