Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
luat tuc » luat thue
dang xay » dang van, van xay
hieu va » lieu va, hieu qua
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
va luat » va thuat, vay luan, cua luat
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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) or (toc sach)) y ((nang x) or (dang xay)) hoi. hieu va luat tuc va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y ((nang x) OR (dang xay)) hoi. hieu va luat tuc va danh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) y ((nang x) or (dang xay)) hoi. hieu va luat tuc va danh di cua tre*.