Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
mai khoa » tai khoa, may khoa, dai khoa
mai khoi » tai khoa, cac khoi, dai khoa
hai cua » thai cua, dai cua, hoi cua
duc gia » quoc gia
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
mai hoi » dai hoi, lai hoi, mai doi
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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) or (mai khoa)))). hieu va cam duc gia thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((mai hoi) OR (((mai khoi) OR (mai khoa)))). hieu va cam duc gia thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((mai hoi) or (((mai khoi) or (mai khoa)))). hieu va cam duc gia thanh hai cua tre*.