Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
ve cac » va cac, vien cac
loc va » hoc va, luc va
vi cua » vai cua, di cua
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 cac loc va dinh 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 cac loc va dinh vi cua te*.