Perhaps you should try some spelling variations:
hanh luat » nganh luat, hang luan, hanh lam
luat cua » luat sua, xuat cua, lua cua
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
cac bac » cac bai, cac ban, cac cach
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2

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