Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
thuoc cac » thuoc cuc, thuoc cao, thuoc dac
ky dang » ky nang
ky danh » ky anh
dan vai » dan va, dan tai, dan vat
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach ((ky dang) or (ky danh)) xa hoi. hieu ((va nam) OR (va nay)) thuoc cac dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ((ky dang) OR (ky danh)) xa hoi. hieu ((va nam) OR (va nay)) thuoc cac dan vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ((ky dang) or (ky danh)) xa hoi. hieu ((va nam) OR (va nay)) thuoc cac dan vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((ky dang) or (ky danh)) xa hoi. hieu ((va nam) OR (va nay)) thuoc cac dan vai cuu tre*.