Perhaps you should try some spelling variations:
tinh cuu » trinh cuu, dinh cuu, tinh cua
va thanh » gia thanh, ban thanh, va tinh
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve bao » te bao, va bao
ve co » vo co, va co, de co

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang xa hoi. hieu ((ve co) or (ve bao)) duc ((ban hanh) or (va thanh)) tinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu ((ve co) OR (ve bao)) duc ((ban hanh) OR (va thanh)) tinh cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu ((ve co) or (ve bao)) duc ((ban hanh) or (va thanh)) tinh cuu tre*.