Perhaps you should try some spelling variations:
bach duoc » bach tuoc, sach duoc, ban duoc
hieu vien » hieu hien, hieu viec, thieu nien
va thanh » gia thanh, ban thanh, va tinh
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
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) OR (sach y)) nang xa hoi. hieu vien bach duoc ((va thanh) or (va danh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang xa hoi. hieu vien bach duoc ((va thanh) OR (va danh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang xa hoi. hieu vien bach duoc ((va thanh) or (va danh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang xa hoi. hieu vien bach duoc ((va thanh) or (va danh)) tai cua tre*.