Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
ly nang » ky nang, ly hang, ly quang
ly vang » ly hang, ly van, ly quang
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 ((ly nang) or (ly vang)) x hoi. hieu van cau duc va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ly vang)) x hoi. hieu van cau duc va hanh di cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) or (ly vang)) x hoi. hieu van cau duc va hanh di cua viet*.