Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh dung » thanh duong, thanh tung, thanh hung
dung thang » hung thang, cung thang, dung thuong
dung phan » dung nhan, dung luan, dung ha
phan cong » thanh cong
dung dat » dung va, dung tai
pha tap » pham tai

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 - thanh dung phan cong ((dung thang) or (dung dat)) pha tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh dung phan cong ((dung thang) OR (dung dat)) pha tap.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh dung phan cong ((dung thang) or (dung dat)) pha tap*.