Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
ky sang » ky dang, ky tang, duy sang
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
va cam » va cham, va cac, va cao
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ky sang) or (ky nang)) lap tai. hieu va cam duc va hanh ((vi cua) or (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky sang) OR (ky nang)) lap tai. hieu va cam duc va hanh ((vi cua) OR (vai cua)) te.
• Adding a wildcard symbol may retrieve word variants: so sach ((ky sang) or (ky nang)) lap tai. hieu va cam duc va hanh ((vi cua) or (vai cua)) te*.