Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
danh vi » hanh vi, dinh vi, danh di
van cam » van nam, van lam, van cau
lap hai » lap tai, lap lai, lap hoat
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
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: tu sach ((ky tang) or (ky dang)) lap hai. hieu van cam ((xuc va) OR (tuc va)) danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky tang) OR (ky dang)) lap hai. hieu van cam ((xuc va) OR (tuc va)) danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky tang) or (ky dang)) lap hai. hieu van cam ((xuc va) OR (tuc va)) danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky tang) or (ky dang)) lap hai. hieu van cam ((xuc va) OR (tuc va)) danh vi cua te*.