Perhaps you should try some spelling variations:
sang lap » sang ma, sang tai, dan lap
sang tao » hang tai
so sach » so sanh, bo sach, co sach
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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