Perhaps you should try some spelling variations:
van thanh » ban thanh
thu sach » tu sach, thuat sach, thuoc sach
van tuan » van quan, van ban, anh tuan
vien dai » hien dai
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
tu cham » toc cham, thi cham
sach ly » sach y, sach lo, sach ty
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa

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 ly nang ma hoi. hieu ((vien dai) or (tu cham)) xuc ((van thanh) OR (van tuan)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang ma hoi. hieu ((vien dai) OR (tu cham)) xuc ((van thanh) OR (van tuan)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang ma hoi. hieu ((vien dai) or (tu cham)) xuc ((van thanh) OR (van tuan)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang ma hoi. hieu ((vien dai) or (tu cham)) xuc ((van thanh) OR (van tuan)) hai cua tre*.