Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
thu sach » tu sach, thuat sach, thuoc sach
bach lop » cac lop, ba lop, bach hoa
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
tu cach » tu cac
dan sai » danh sai, doan sai, dan tai
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
lop va » lap va, hop va, nop va
va dan » ca dan, va dao, va dau

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) or (tu cach))) or (su sach)) ky nang xa hoi. hieu hien bach lop va dan sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((thu sach) OR (tu cach))) OR (su sach)) ky nang xa hoi. hieu hien bach lop va dan sai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((thu sach) or (tu cach))) or (su sach)) ky nang xa hoi. hieu hien bach lop va dan sai cua tre*.