Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
thu lang » thu hang, thu bang, phu lang
lang mai » lang dai, lang hai, lang man
tu sach » su sach, te sach, tu cach
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) thu lang mai hoi. hieu ((va cac) or (va bai)) xuc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) thu lang mai hoi. hieu ((va cac) OR (va bai)) xuc va hanh vi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) thu lang mai hoi. hieu ((va cac) or (va bai)) xuc va hanh vi cua vat".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) thu lang mai hoi. hieu ((va cac) or (va bai)) xuc va hanh vi cua vat*.