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

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