Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nam xuc » cam xuc, nam xua, nam thuc
danh vi » dinh vi, danh di, danh va
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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 y nang ma hoi. ((hieu van) or (thien van)) nam xuc va ((danh vi) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. ((hieu van) OR (thien van)) nam xuc va ((danh vi) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. ((hieu van) or (thien van)) nam xuc va ((danh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. ((hieu van) or (thien van)) nam xuc va ((danh vi) OR (hanh vi)) cua tre*.