Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
so sach » bo sach, co sach, hoc sach
va danh » va dinh, va dan, va hanh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
so sanh » do sanh
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
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: ((so sach) or (so sanh)) ky sang lap hai. hieu ve cau luc va danh ((vi cua) OR (di cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky sang lap hai. hieu ve cau luc va danh ((vi cua) OR (di cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ky sang lap hai. hieu ve cau luc va danh ((vi cua) OR (di cua)) tu".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ky sang lap hai. hieu ve cau luc va danh ((vi cua) OR (di cua)) tu*.