Perhaps you should try some spelling variations:
"su sach tien thuc hanh khoa kham thuong" » "su sach tien thuc hanh khoa pham thuong", "su sach tien thuc hanh khoa khac thuong", "su sach tien thuc hanh khoa khai thuong", "su sach tren thuc hanh khoa kham thuong", "su sach thieu thuc hanh khoa kham thuong", "su sach trien thuc hanh khoa kham thuong", "su sach kien thuc hanh khoa kham thuong", "su sach bien thuc hanh khoa kham thuong", "su sach tien thuc hang khoa kham thuong", "su sach tien thuc anh khoa kham thuong", "su sach tien thuc hanh hoa kham thuong", "su sach tien thuc hanh kho khan thuong", "so sach tien thuc hanh khoa kham thuong", "vu sach tien thuc hanh khoa kham thuong"
"su sach tri tuc cac khoa than thong" » "su sach tri tuc cac khoa than thuong", "su sach tri tuc cac khoa toan thong", "su sach tri tuc cac khoa tran thong", "su sach tri tuc cac khoa luan thong", "su sach tri tuc cac hoa thai thong", "su sach tri tuc cac hoa tan thong", "su sach tai tuc cac khoa than thong", "su sach tren tuc cac khoa than thong", "su sach truc tuc cac khoa than thong", "su sach tri tuc cac khoan than thong", "su sach tri tuc cac khoi than thong", "su sach tri tuc dac khoa than thong", "so sach tri tuc cac khoa than thong", "vu sach tri tuc cac khoa than thong", "su sach tri thuc cac khoa than thong", "su sach tri tue cac khoa than thong", "su sach tri tac cac khoa than thong", "su sach tri tu cac khoa than thong", "su sach tri tich cac khoa than thong"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("su sach tien thuc hanh khoa kham thuong") or ("su sach tri tuc cac khoa than thong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach tien thuc hanh khoa kham thuong") OR ("su sach tri tuc cac khoa than thong")).
• Removing quotes may allow a broader search: (( su sach tien thuc hanh khoa kham thuong ) or ( su sach tri tuc cac khoa than thong )).
• Adding a wildcard symbol may retrieve word variants: (("su sach tien thuc hanh khoa kham thuong") or ("su sach tri tuc cac khoa than thong"))*.