Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
dai moi » doi moi
sach ky » sac ky, sach y, sach ty
dai hoi » dai hoc, dai hai
mai hoi » mai khoi, lai hoi, mai doi
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
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: tu sach ky lang ((mai hoi) or (((dai hoi) OR (dai moi)))). hieu ve cam xuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ((mai hoi) OR (((dai hoi) OR (dai moi)))). hieu ve cam xuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang ((mai hoi) or (((dai hoi) OR (dai moi)))). hieu ve cam xuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang ((mai hoi) or (((dai hoi) OR (dai moi)))). hieu ve cam xuc va hanh vai cuu tre*.