Perhaps you should try some spelling variations:
luat ban » luat bao, luat dan, luat bat
te sach » toc sach
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang ma) or (tang ma)) hoi. hieu va cam ((luat ban) or (duc ban)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (tang ma)) hoi. hieu va cam ((luat ban) OR (duc ban)) anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (tang ma)) hoi. hieu va cam ((luat ban) or (duc ban)) anh vi cua tre*.