Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
sai ky » sac ky

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 ky) or (sai ky)) tang ((ma hoi) OR (xa hoi)). hieu va cam xuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sai ky)) tang ((ma hoi) OR (xa hoi)). hieu va cam xuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sai ky)) tang ((ma hoi) OR (xa hoi)). hieu va cam xuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) tang ((ma hoi) OR (xa hoi)). hieu va cam xuc va hanh vai cuu tre*.