Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

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