Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
lap hoat » tap hoa, dan hoat, lap dat
dinh vi » dinh ve, dinh viet, dinh tri
tu sach » thu sach, su sach, te sach
nam xuc » cam xuc, nam xua, nam thuc
ky dang » ky nang, ky danh
xuc va » duc va, tuc 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: tu sach ((kho tang) or (ky dang)) lap hoat. hieu van nam xuc va ((dinh vi) or (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((kho tang) OR (ky dang)) lap hoat. hieu van nam xuc va ((dinh vi) OR (hanh vi)) cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((kho tang) or (ky dang)) lap hoat. hieu van nam xuc va ((dinh vi) or (hanh vi)) cua te*.