Perhaps you should try some spelling variations:
bach duoc » bach tuoc, sach duoc, ban duoc
hieu vien » hieu hien, hieu viec, thieu nien
duoc gia » duoc giao, quoc gia, duc gia
thanh vi » thanh va, thanh ve, nhanh vi
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cua tre » cua te, cuu tre, cua triet

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 xa hoi. hieu vien bach duoc gia ((thanh vi) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. hieu vien bach duoc gia ((thanh vi) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu vien bach duoc gia ((thanh vi) OR (hanh vi)) cua tre*.