Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thinh doan » chinh doanh, hinh toan, thi doan
phong cong » phong chong, thong cong, chong cong
cong thang » cong thanh, cang thang, cong thong
va phong » van phong, va phuong, va thong
phan van » pham van, thanh van, luan van

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 - thinh doan va phong cong thang ((phan van) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thinh doan va phong cong thang ((phan van) OR (phan tu))*.