Perhaps you should try some spelling variations:
nang lap » nang cap, sang lap, nang lam
vu sach » vu bach, su sach, vu khach
cam luc » cam xuc, cau luc
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu van
dinh vi » dinh ve, dinh viet, dinh tri
hieu va » hieu qua
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
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: vu sach ky nang lap hai. ((hieu ve) or (((hieu va) or (lieu va)))) cam luc va dinh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang lap hai. ((hieu ve) OR (((hieu va) OR (lieu va)))) cam luc va dinh vi cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang lap hai. ((hieu ve) or (((hieu va) or (lieu va)))) cam luc va dinh vi cua te*.