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

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) OR (tu cach))) or (su sach)) ky nang xa hoi. hieu hien bach lop va danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (su sach)) ky nang xa hoi. hieu hien bach lop va danh sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((tu sach) OR (tu cach))) or (su sach)) ky nang xa hoi. hieu hien bach lop va danh sai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) OR (tu cach))) or (su sach)) ky nang xa hoi. hieu hien bach lop va danh sai cua tre*.