Perhaps you should try some spelling variations:
nang lap » nang cap, sang lap, nang lam
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va
loc va » hoc va
dan vi » doan vi, don vi, dan 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: su sach ky nang lap hai. hieu ve cam ((luc va) OR (loc va)) dan vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang lap hai. hieu ve cam ((luc va) OR (loc va)) dan vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang lap hai. hieu ve cam ((luc va) OR (loc va)) dan vi cua te*.