Perhaps you should try some spelling variations:
ban hanh » ban hang
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
cac loc » cac lop, cac toc, cac hoc
hieu va » lieu va, hieu qua
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky dang xa hoi. hieu va cac loc ((ban hanh) or (((va danh) or (gia dinh)))) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu va cac loc ((ban hanh) OR (((va danh) OR (gia dinh)))) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu va cac loc ((ban hanh) or (((va danh) or (gia dinh)))) vi cua tre*.