Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
chat cua » nhat cua, chat va, chat huu
cham cuu » cap cuu
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
van hoi » van hoa, van hoc, van hoe
ty hang » ly hang, ty xang, thi hang
ty tang » tay tang, ty xang, ky tang
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 tang) OR (ty hang)) van hoi. hieu va ((cham cuu) or (chat cua)) va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty tang) OR (ty hang)) van hoi. hieu va ((cham cuu) OR (chat cua)) va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty tang) OR (ty hang)) van hoi. hieu va ((cham cuu) or (chat cua)) va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty tang) OR (ty hang)) van hoi. hieu va ((cham cuu) or (chat cua)) va thanh vai cua tre*.