Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
ly nang » ky nang, ly hang, ly vang
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
y nang » ky nang, v nang, may nang
xac va » tac va, ac va, bac va
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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