Perhaps you should try some spelling variations:
sach thuat » sach tham, dich thuat, cac thuat
thuat bang » thuat ban, thuat mang, thuat nang
thu sach » tu sach, thuat sach, thuoc sach
cham xuc » cam xuc, chat xuc, cham soc
bang cau » hang cau, bang cac, nang cao
bai cua » ban cua, bai ca, hai cua
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
hieu ve » hieu van
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: thu sach thuat bang cau hoi. ((hieu ve) OR (hieu va)) cham xuc va hanh ((bai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thuat bang cau hoi. ((hieu ve) OR (hieu va)) cham xuc va hanh ((bai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thuat bang cau hoi. ((hieu ve) OR (hieu va)) cham xuc va hanh ((bai cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach thuat bang cau hoi. ((hieu ve) OR (hieu va)) cham xuc va hanh ((bai cua) or (dai cua)) tre*.