Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
cam luc » cam xuc, cau luc
danh vi » hanh vi, dinh vi, danh di
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
sach ky » sac ky, sach y, sach kem
va danh » va dinh, va dan, va hanh
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
cua te » cua tu

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