Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hanh di » hanh vi, hanh de, hang di
cua tuc » cua duc, cua tu, cua thuoc
y nang » ky nang, ly nang, v nang
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: tu sach y nang xa hoi. hieu van luat ((tuc va) or (tuc xa)) hanh di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van luat ((tuc va) OR (tuc xa)) hanh di cua tuc.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van luat ((tuc va) or (tuc xa)) hanh di cua tuc*.