Perhaps you should try some spelling variations:
ban hanh » ban hang
dang xay » dang van, van xay
tu sach » thu sach, te sach, tu cach
van anh » van thanh, tuan anh, van minh
hieu va » lieu va, hieu qua
va dang » van dang, va nang, va lang
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua

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 (su sach)) v nang xa hoi. hieu va dang xay ((ban hanh) or (van anh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) v nang xa hoi. hieu va dang xay ((ban hanh) OR (van anh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) v nang xa hoi. hieu va dang xay ((ban hanh) or (van anh)) vi cua tre*.