Perhaps you should try some spelling variations:
nang lap » nang cap, sang lap, nang lam
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va dan, va hanh
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

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