Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
cham luc » cham soc, nhan luc, cham cuu
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
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) or (sach ty)) sang lap tai. hieu ve cham luc va danh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach ty)) sang lap tai. hieu ve cham luc va danh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) or (sach ty)) sang lap tai. hieu ve cham luc va danh vi cua tu*.