Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu tien » hieu tieng, tieu tien, hieu hien
ban thanh » ban hanh, ban hang
tien mai » tien manh, tiet may, tien va
mai duc » mai dich, mai quoc, mai dung
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vai cau » van cau, lai chau, mai chau
vai cac » va cac, tai cac, voi cac
va cau » van cau, va cac, va dau

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 nang xa hoi. hieu tien mai duc ban thanh ((((vai cau) OR (va cau))) or (vai cac)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ky nang xa hoi. hieu tien mai duc ban thanh ((((vai cau) OR (va cau))) OR (vai cac)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky nang xa hoi. hieu tien mai duc ban thanh ((((vai cau) OR (va cau))) or (vai cac)) tren".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky nang xa hoi. hieu tien mai duc ban thanh ((((vai cau) OR (va cau))) or (vai cac)) tren*.