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
danh vi » dinh vi, danh di, danh va
cam loc » cam lo
hieu va » lieu va, hieu qua
hieu ve » hieu van
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
loc va » hoc va, luc 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 sang lap hai. ((hieu ve) or (hieu va)) cam loc va ((danh vi) OR (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky sang lap hai. ((hieu ve) OR (hieu va)) cam loc va ((danh vi) OR (hanh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky sang lap hai. ((hieu ve) or (hieu va)) cam loc va ((danh vi) OR (hanh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky sang lap hai. ((hieu ve) or (hieu va)) cam loc va ((danh vi) OR (hanh vi)) cua te*.