Perhaps you should try some spelling variations:
ptong tienh » phong tinh
tong tien » trong tien, dong tien, trong tieng
thu sach » tu sach, thuat sach, thuoc sach
sach han » sach tham, sach danh, sach nang
co ptong » co phong, co tong, co xuong
giai can » giai han, giai san, giai ca
can tong » han tong, ban tong, can dong
le gioi » ve gioi, loi gioi
gioi co » nguoi co
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
le giai » de giai, ly giai, ve giai
han le » phan le, han lee, han lew
tu le » vu le, tu te

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sach han le gioi co ptong tienh ) or ( su sach tu le giai can tong tien ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach han le gioi co ptong tienh ) OR ( su sach tu le giai can tong tien )).
• Adding a wildcard symbol may retrieve word variants: (( thu sach han le gioi co ptong tienh ) or ( su sach tu le giai can tong tien ))*.