Perhaps you should try some spelling variations:
kmay nang » ky nang, kha nang, may nong
may nang » may nong, ky nang, cam nang
hanh hai » thanh hai, nhanh hai, hang hai
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, nam duoc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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. hieu ve ((cam duc) OR (pham duc)) va hanh 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. hieu ve ((cam duc) OR (pham duc)) va hanh 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. hieu ve ((cam duc) OR (pham duc)) va hanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((may nang) or (kmay nang)) ma hoi. hieu ve ((cam duc) OR (pham duc)) va hanh hai cua tre*.