Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
duoc gia » duoc giao, duc gia, luoc gia
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, te sach
ky dang » ky danh
cua tre » cua te, cuu tre, cua triet
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: tu sach ((ky dang) or (ky nang)) xa hoi. hieu vien bach ((duoc gia) OR (quoc gia)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) xa hoi. hieu vien bach ((duoc gia) OR (quoc gia)) thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) or (ky nang)) xa hoi. hieu vien bach ((duoc gia) OR (quoc gia)) thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) xa hoi. hieu vien bach ((duoc gia) OR (quoc gia)) thanh vi cua tre*.