Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va hanh » van hanh, va thanh, va danh
nang o » nang co, nang ho, nang ro
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di 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: tu ((sach y) or (cac ky)) nang o hoi. hieu ((va cam) or (ve cac)) xuc va hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (cac ky)) nang o hoi. hieu ((va cam) OR (ve cac)) xuc va hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (cac ky)) nang o hoi. hieu ((va cam) or (ve cac)) xuc va hanh vi cua viet*.