Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, vu sach
dang xa » dang xay, lang xa, dang ha
cac cua » cach cua, cac qua, ca cua
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
te sach » toc sach
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
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 (tu cach))) or (te sach)) ky dang xa hoi. hieu ve cac cua ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (tu cach))) OR (te sach)) ky dang xa hoi. hieu ve cac cua ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (tu cach))) or (te sach)) ky dang xa hoi. hieu ve cac cua ban hanh vi cua tre*.