Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
xuc ban » duc ban, cuc ban, quoc ban
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
anh ca » danh ca, anh cam, anh cua
ca cua » co cua
ve cac » va cac, vien cac

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 (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (xuc ban)) anh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) OR (xuc ban)) anh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (xuc ban)) anh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky nang xa hoi. hieu ve cac ((duc van) or (xuc ban)) anh ca cua tre*.