Perhaps you should try some spelling variations:
luat tuc » luat thue
cua luat » quy luat
hieu cua » hieu qua, dieu cua, bieu cua
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) OR (sach ty)) lang xa hoi. hieu cua luat tuc ((va tinh) or (may tinh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach ty)) lang xa hoi. hieu cua luat tuc ((va tinh) OR (may tinh)) doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) OR (sach ty)) lang xa hoi. hieu cua luat tuc ((va tinh) or (may tinh)) doi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sach ty)) lang xa hoi. hieu cua luat tuc ((va tinh) or (may tinh)) doi cua tre*.