Perhaps you should try some spelling variations:
"su sach tinh ban va cong" » "su sach kinh ban va cong", "su sac tinh ban va cong", "su sach tranh ban va cong", "su sach tinh bang va cong", "su sach trinh ban va cong", "su sach tinh bac va cong", "so sach tinh ban va cong", "vu sach tinh ban va cong", "su sach tinh ban tai cong", "su sach tinh ban cua cong"
"te sach hinh bai gian muon" » "te sach kinh bai gian muon", "te sach danh bai gian muon", "te sach han bai gian muon", "te sach hinh bai gian muong", "te sach hinh bai gian cuon", "te sach hinh bai ban muon", "te sach hinh tai gian muon", "te sach hinh thai gian muon", "te sach tinh bac gian muon", "te sach hinh bai giang muon", "te sach hinh bai giai muon", "te sach hinh bac giang muon", "toc sach hinh bai gian muon"

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 tinh ban va cong") or ("te sach hinh bai gian muon"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach tinh ban va cong") OR ("te sach hinh bai gian muon")).
• Removing quotes may allow a broader search: (( su sach tinh ban va cong ) or ( te sach hinh bai gian muon )).
• Adding a wildcard symbol may retrieve word variants: (("su sach tinh ban va cong") or ("te sach hinh bai gian muon"))*.