Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
hieu ve » hieu van
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 lap hai. ((hieu ve) OR (hieu va)) cam luc va danh vi ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang lap hai. ((hieu ve) OR (hieu va)) cam luc va danh vi ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky sang lap hai. ((hieu ve) OR (hieu va)) cam luc va danh vi ((cua tu) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: so sach ky sang lap hai. ((hieu ve) OR (hieu va)) cam luc va danh vi ((cua tu) or (cua su))*.