Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
dan vi » doan vi, don vi, dan 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: vu sach ky sang lap hai. hieu ve cam ((tuc xa) or (duc va)) dan vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky sang lap hai. hieu ve cam ((tuc xa) OR (duc va)) dan vi cua tu.
• Adding a wildcard symbol may retrieve word variants: vu sach ky sang lap hai. hieu ve cam ((tuc xa) or (duc va)) dan vi cua tu*.