Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
cham xuc » cam xuc, chat xuc, cham soc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
mai hoi » dai hoi, lai hoi, mai doi
sac ky » sai ky
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sac ky) OR (cac ky)) tang ((mai hoi) or (mai khoi)). hieu ve cham xuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sac ky) OR (cac ky)) tang ((mai hoi) OR (mai khoi)). hieu ve cham xuc va hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sac ky) OR (cac ky)) tang ((mai hoi) or (mai khoi)). hieu ve cham xuc va hanh di cua tre*".