Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
hieu vien » hieu hien, hieu viec, thieu nien
va hanh » van hanh, va thanh, va danh
va xanh » va danh, va anh, va banh
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi 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: su ((sach ky) OR (sach ty)) nang xa hoi. hieu vien bach tuoc ((va xanh) or (va hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu vien bach tuoc ((va xanh) OR (va hanh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang xa hoi. hieu vien bach tuoc ((va xanh) or (va hanh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang xa hoi. hieu vien bach tuoc ((va xanh) or (va hanh)) di cua tre*.