Perhaps you should try some spelling variations:
cua luat » quy luat
dang xay » dang van, van xay
hieu cua » hieu qua, dieu cua, bieu cua
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, duc va
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 y ((nang xa) or (dang xay)) hoi. hieu cua luat ((tuc va) OR (tuc xa)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (dang xay)) hoi. hieu cua luat ((tuc va) OR (tuc xa)) hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang xa) or (dang xay)) hoi. hieu cua luat ((tuc va) OR (tuc xa)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (dang xay)) hoi. hieu cua luat ((tuc va) OR (tuc xa)) hanh di cua tre*.