Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
su sach » so sach, vu sach
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc van » duc va, duc manh, duc phan
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky sang ma hoa. hieu ve pham ((duc van) OR (duc tan)) thanh tai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky sang ma hoa. hieu ve pham ((duc van) OR (duc tan)) thanh tai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky sang ma hoa. hieu ve pham ((duc van) OR (duc tan)) thanh tai cuu tre*.