Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
kmay nang » ky nang, kha nang, may nong
may nang » may nong, ky nang, cam nang
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
ve cam » ve cham, ve cac, va cam
ma hoi » xa hoi, ma hoa, me hoi

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