Perhaps you should try some spelling variations:
tinh doi » trinh doc, trinh do, tinh hoc
luat tuc » luat thue
cua luat » quy luat
hieu cua » hieu qua, dieu cua, bieu cua
te sach » toc sach
doi cuu » doi cua, doi cuoc
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
sang ma » nang ma, sang tao, sang tai
tang ma » tang van
tuc va » thuc va, truc va, tuc xa

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 ((((tang ma) OR (mang may))) or (sang ma)) hoi. hieu cua luat tuc va tinh doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((((tang ma) OR (mang may))) OR (sang ma)) hoi. hieu cua luat tuc va tinh doi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((((tang ma) OR (mang may))) or (sang ma)) hoi. hieu cua luat tuc va tinh doi cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((((tang ma) OR (mang may))) or (sang ma)) hoi. hieu cua luat tuc va tinh doi cuu tre*.