Perhaps you should try some spelling variations:
cua nuoc » cua quoc, cua nguoi, cua thuoc
luat tuc » luat thue
hieu dac » hieu cac, bieu dac, chieu day
dac luat » dan luat, dap luat, cac luat
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ky) OR (sach ty)) nang x hoi. hieu dac luat tuc va hanh di ((cua tu) or (cua nuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang x hoi. hieu dac luat tuc va hanh di ((cua tu) OR (cua nuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach ty)) nang x hoi. hieu dac luat tuc va hanh di ((cua tu) or (cua nuoc))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach ty)) nang x hoi. hieu dac luat tuc va hanh di ((cua tu) or (cua nuoc))*.