Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, cao duc, pham duc
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
te sach » toc sach
hieu va » lieu va, hieu qua
mai hoi » dai hoi, lai hoi, mai doi
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((mai hoi) or (mai khoi)). hieu va cam duc va thanh ((hai cua) OR (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((mai hoi) OR (mai khoi)). hieu va cam duc va thanh ((hai cua) OR (hoi cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((mai hoi) or (mai khoi)). hieu va cam duc va thanh ((hai cua) OR (hoi cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((mai hoi) or (mai khoi)). hieu va cam duc va thanh ((hai cua) OR (hoi cua)) triet*.