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
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((x ho) or (o hai)). hieu ve cam duc va hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((x ho) OR (o hai)). hieu ve cam duc va hanh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x ho) or (o hai)). hieu ve cam duc va hanh vi cua cu*.