Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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