Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thanh te » thanh ve, thanh de, thanh le
mai hoi » mai khoi, dai hoi, lai hoi
tuc gia » tac gia, duc gia, toc gia
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi
v nang » va nang, vu nang, van nang
va cam » va cham, va cac, va cao
te cua » tue cua, le cua, de 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 (su sach)) v nang ((ma hoi) OR (mai hoi)). hieu va cam tuc gia thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) v nang ((ma hoi) OR (mai hoi)). hieu va cam tuc gia thanh te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (su sach)) v nang ((ma hoi) OR (mai hoi)). hieu va cam tuc gia thanh te cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) v nang ((ma hoi) OR (mai hoi)). hieu va cam tuc gia thanh te cua tre*.