Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
thanh do » thanh de, thanh pho, thanh hoa
va thanh » gia thanh, ban thanh, va tinh
lam xuc » cam xuc, lam duoc
cua tre » cua te, cuu tre, cua triet
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
xuc va » duc va, tuc va, luc va
do cua » doi cua, co cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y nang) OR (ly nang)) xa hoi. ((thien van) or (thi nang)) lam xuc va thanh do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ly nang)) xa hoi. ((thien van) OR (thi nang)) lam xuc va thanh do cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) OR (ly nang)) xa hoi. ((thien van) or (thi nang)) lam xuc va thanh do cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) OR (ly nang)) xa hoi. ((thien van) or (thi nang)) lam xuc va thanh do cua tre*.