Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh li » nhanh li, hanh vi, han li
co viet » so viet, o viet, hoc viet
sac ky » sai ky
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, 5 hoi
li co » loi co, ly co, xi co

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) nang ((x hoi) OR (x ho)). hieu ve cam duc va hanh li co viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (cac ky)) nang ((x hoi) OR (x ho)). hieu ve cam duc va hanh li co viet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) nang ((x hoi) OR (x ho)). hieu ve cam duc va hanh li co viet*.