Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
van lam » van nam
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di 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 (ky nang)) xa hoi. thien van lam ((xuc ban) OR (duc ban)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) xa hoi. thien van lam ((xuc ban) OR (duc ban)) anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y nang) or (ky nang)) xa hoi. thien van lam ((xuc ban) OR (duc ban)) anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) xa hoi. thien van lam ((xuc ban) OR (duc ban)) anh vi cua tre*.