Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ty hang xa hoi. hieu va cac ((duc ban) OR (duc van)) thanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang xa hoi. hieu va cac ((duc ban) OR (duc van)) thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang xa hoi. hieu va cac ((duc ban) OR (duc van)) thanh vai cua tre*.