Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
danh vi » hanh vi, dinh vi, danh di
ve cam » ve cham, ve cac, va cam
luc va » tuc va, loc 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 tang) or (ky dang)) lap tai. hieu ve cam ((luc va) OR (duc va)) danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky tang) OR (ky dang)) lap tai. hieu ve cam ((luc va) OR (duc va)) danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky tang) or (ky dang)) lap tai. hieu ve cam ((luc va) OR (duc va)) danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky tang) or (ky dang)) lap tai. hieu ve cam ((luc va) OR (duc va)) danh vi cua te*.